53457121

Appears in sequences

• Expansion of (1-x)/((1-2x)(1+x-x^2)).at n=27A052964
• Number of walks of length 2n between two nodes at distance 4 in the cycle graph C_10.at n=12A095931
• a(n) = Sum_{k>=0} binomial(n,5*k+1).at n=28A133476
• a(n) = Sum_{k>=0} binomial(n,5*k+2).at n=28A139714
• sum_{k=floor[(n+5)/2] mod 5} C(n,k).at n=28A173126
• a(n) = Sum_{k=0..n} binomial(5*n+3,5*k+1).at n=5A387812