101118

Appears in sequences

• Theta series of 27-dimensional unimodular lattice with root system A_1 with no parity vector of norm 3.at n=4A002495
• Closed walks of length n along the edges of a pentagon based at a vertex.at n=19A054877
• Number of walks of length 2n+1 between two nodes at distance 5 in the cycle graph C_10.at n=7A095933
• a(n) = Sum_{k>=0} binomial(n,5*k+2).at n=19A139714
• sum_{k=floor[(n+5)/2] mod 5} C(n,k).at n=19A173126