56471
domain: N
Appears in sequences
- Fibonacci sequence beginning 3, 20.at n=18A022129
- a(n) = (1/s(1) - 1/s(2) + ... + d/s(n+1)) * LCM{1, 2, ..., n}, where d = (-1)^n, s = A002944, i.e., s(k) = LCM of row k of Pascal's triangle.at n=13A025538
- Numbers n such that sum of the proper divisors of n is the square of the sum of the digits of n.at n=14A279459