217056

Appears in sequences

• Row sums of triangle A131252.at n=20A131253
• Number of n X 7 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 1 1 and 1 1 1 vertically.at n=16A208779
• Triangle T(n,k) read by rows: coefficients of polynomials P_n(t) defined in Formula section.at n=39A286785
• Triangle T(n,k) read by rows: coefficients of polynomials P_n(t) defined in Formula section.at n=40A286785
• a(n) = Sum_{k=0..floor(n/4)} binomial(n,k) * binomial(2*k,n-4*k).at n=19A389126