70045
domain: N
Appears in sequences
- a(n) = floor(A093456(n+1)/A093456(n)).at n=14A093455
- Cumulative sum of primes p such that 2^p - 1 is a Mersenne prime.at n=23A109472
- a(n) = n!*Sum_{k=0..n} bell(k+1)/k!, n=0,1..., where bell(n) are the Bell numbers, cf. A000110.at n=7A113060
- Number of tilings of a 5 X n rectangle using n pentominoes of shapes L, U, X.at n=15A247125
- Array read by ascending antidiagonals: A(n,k) = n! * [x^n] 1/(1 - x*exp(x))^k.at n=60A380841
- Main diagonal of the array A380841.at n=5A380842