a(n) = Sum_{k=0..n} binomial(7*k,k) / (6*k + 1).
A346671
a(n) = Sum_{k=0..n} binomial(7*k,k) / (6*k + 1).
Terms
- a(0) =1a(1) =2a(2) =9a(3) =79a(4) =898a(5) =11370a(6) =153148a(7) =2150836a(8) =31140511a(9) =461462144a(10) =6964815000a(11) =106691488130
External references
- oeis: A346671