53774932

Appears in sequences

• Expansion of the g.f. x/((1+2x)(1-x-x^2)).at n=27A084179
• Number of walks of length 2n between two nodes at distance 2 in the cycle graph C_10.at n=13A095930
• a(n) = Sum_{k >= 0} binomial(n,5*k).at n=28A139398
• a(n) = Sum_{ k >= 0} binomial(n,5*k+3).at n=28A139748
• a(n) = Sum_{k=0..n} binomial(5*n+3,5*k).at n=5A345457
• a(n) = Sum_{k=0..n} binomial(2*n,5*k).at n=14A387844
• a(n) = Sum_{k=0..n} binomial(4*n,5*k).at n=7A387848
• a(n) = Sum_{k=0..n} binomial(3*n+1,5*k).at n=9A387872