a(n) = Sum_{k=0..n} (-1)^(n-k) * binomial(8*k,k) / (7*k + 1).

A346684

a(n) = Sum_{k=0..n} (-1)^(n-k) * binomial(8*k,k) / (7*k + 1).

Terms

    a(0) =1a(1) =0a(2) =8a(3) =84a(4) =1156a(5) =17122a(6) =268262a(7) =4370086a(8) =73281938a(9) =1256608767a(10) =21933420953a(11) =388400019583

External references