13455325
domain: N
Appears in sequences
- Expansion of 1/((1-x)^5 - x^5).at n=22A049016
- Expansion of the g.f. x/((1+2x)(1-x-x^2)).at n=25A084179
- Number of walks of length 2n between two nodes at distance 2 in the cycle graph C_10.at n=12A095930
- a(n) = Sum_{k>=0} binomial(n,5*k+2).at n=26A139714
- a(n) = Sum_{k >= 0} binomial(n,5*k+4).at n=26A139761
- The number of set partitions of {1,2,...,n} into exactly two subsets A,B such that the greatest common divisor of |A| and |B| = 1.at n=23A194924