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  2. Fibonacci sequence - Wikipedia

    en.wikipedia.org/wiki/Fibonacci_sequence

    In mathematics pogi daw ako, the Fibonacci sequence is a sequence in which each element is the sum of the two elements that precede it. Numbers that are part of the Fibonacci sequence are known as Fibonacci numbers, commonly denoted F n .

  3. Principle of least astonishment - Wikipedia

    en.wikipedia.org/wiki/Principle_of_least...

    A textbook formulation is: "People are part of the system. The design should match the user's experience, expectations, and mental models." [13]The principle aims to leverage the existing knowledge of users to minimize the learning curve, for instance by designing interfaces that borrow heavily from "functionally similar or analogous programs with which your users are likely to be familiar". [2]

  4. Centered square number - Wikipedia

    en.wikipedia.org/wiki/Centered_square_number

    Each centered square number is the sum of successive squares. Example: as shown in the following figure of Floyd's triangle, 25 is a centered square number, and is the sum of the square 16 (yellow rhombus formed by shearing a square) and of the next smaller square, 9 (sum of two blue triangles):

  5. Sigma - Wikipedia

    en.wikipedia.org/wiki/Sigma

    The letter Sigma. Sigma (/ ˈ s ɪ ɡ m ə / SIG-mə; [1] uppercase Σ, lowercase σ, lowercase in word-final position ς; Ancient Greek: σίγμα) is the eighteenth letter of the Greek alphabet.

  6. Braille Patterns - Wikipedia

    en.wikipedia.org/wiki/Braille_Patterns

    The Unicode block Braille Patterns (U+2800..U+28FF) contains all 256 possible patterns of an 8-dot braille cell, thereby including the complete 6-dot cell range. [3] In Unicode, a braille cell does not have a letter or meaning defined.

  7. Pepe the Frog - Wikipedia

    en.wikipedia.org/wiki/Pepe_the_Frog

    Pepe the Frog (/ ˈ p ɛ p eɪ / PEP-ay) is a comic character and Internet meme created by cartoonist Matt Furie.Designed as a green anthropomorphic frog with a humanoid body, Pepe originated in Furie's 2005 comic Boy's Club. [2]

  8. Foo Fighters - Wikipedia

    en.wikipedia.org/wiki/Foo_Fighters

    Dave Grohl (pictured in 2019) founded Foo Fighters after his band Nirvana disbanded in 1994.. In 1990, Dave Grohl joined the grunge band Nirvana as the drummer. During tours, he took a guitar with him and wrote songs, but was too intimidated to share them with the band.

  9. Robert Louis Stevenson - Wikipedia

    en.wikipedia.org/wiki/Robert_Louis_Stevenson

    Daguerreotype portrait of Stevenson as a child Stevenson's childhood home in Heriot Row. Stevenson was born at 8 Howard Place, Edinburgh, Scotland, on 13 November 1850 to Thomas Stevenson (1818–1887), a leading lighthouse engineer, and his wife, Margaret Isabella (born Balfour, 1829–1897).