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168 is the number of maximal chains in the Bruhat order of symmetric group, ... Some Chinese consider 168 a lucky number, because 一六八 ("168") Mandarin pinyin: ...
Chinese numerology. Some numbers are believed by some to be auspicious or lucky (吉利, pinyin: jílì; Cantonese Yale: gātleih) or inauspicious or unlucky (不吉, pinyin: bùjí; Cantonese Yale: bātgāt) based on the Chinese word that the number sounds similar to. The numbers 6 and 8 are widely considered to be lucky, while 4 is considered ...
Numerology (known before the 20th century as arithmancy) is the belief in an occult, divine or mystical relationship between a number and one or more coinciding events. It is also the study of the numerical value, via an alphanumeric system, of the letters in words and names. When numerology is applied to a person's name, it is a form of onomancy.
Lucky number. In number theory, a lucky number is a natural number in a set which is generated by a certain "sieve". This sieve is similar to the sieve of Eratosthenes that generates the primes, but it eliminates numbers based on their position in the remaining set, instead of their value (or position in the initial set of natural numbers). [1]
It is also a Lucky prime. 1022 = Friedman number; ... 1477 = 7-Knödel number [168] 1478 = total number of largest parts in all compositions of 11 [346]
Happy number. Numbers with a certain property involving recursive summation. Tree showing all happy numbers up to 100, with 130 seen with 13 and 31. In number theory, a happy number is a number which eventually reaches 1 when replaced by the sum of the square of each digit. For instance, 13 is a happy number because , and .
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the largest lucky number of Euler: the polynomial f(k) = k 2 − k + 41 yields primes for all the integers k with 1 ≤ k < 41. the sum of two squares (4 2 + 5 2), which makes it a centered square number. [4] the sum of the first three Mersenne primes, 3, 7, 31. [5] the sum of the sum of the divisors of the first 7 positive integers.