3368259

Appears in sequences

• Expansion of the g.f. x/((1+2x)(1-x-x^2)).at n=23A084179
• Number of walks of length 2n between two nodes at distance 2 in the cycle graph C_10.at n=11A095930
• a(n) = Sum_{k>=0} binomial(n,5*k+1).at n=24A133476
• a(n) = Sum_{ k >= 0} binomial(n,5*k+3).at n=24A139748
• a(n) = Sum_{k=0..n} binomial(5*n+4,5*k+1).at n=4A387813