27496
domain: N
Appears in sequences
- Expansion of tanh(tan(x)*exp(x)).at n=8A009814
- Number of 3-dimensional polyominoes (or polycubes) with n cells and rotational symmetry group of order exactly 2.at n=12A066454
- a(n) = 4*a(n-1) + 10*a(n-2), with a(1)=0 and a(2)=1.at n=7A180226
- Positions of 2 in sequence A217916.at n=31A217918
- Number of length 3 1..(n+1) arrays with every leading partial sum divisible by 2, 3, 5, 7 or 11.at n=37A254950
- Numbers k such that 363*2^k+1 is prime.at n=27A323006
- E.g.f. A(x) satisfies A'(x) = 1 + 2 * (exp(x) - 1) * A(x).at n=9A355233
- Row sums of A364891.at n=45A364892