a(n) = Sum_{k=0..n} (-1)^k * (2*k+1) * binomial(5*n-3*k+1,n-k)/(5*n-3*k+1).
A390742
a(n) = Sum_{k=0..n} (-1)^k * (2*k+1) * binomial(5*n-3*k+1,n-k)/(5*n-3*k+1).
Terms
- a(0) =1a(1) =0a(2) =3a(3) =21a(4) =178a(5) =1612a(6) =15332a(7) =151054a(8) =1528338a(9) =15787951a(10) =165830186a(11) =1765738401a(12) =19016521496a(13) =206785426797
External references
- oeis: A390742