a(n) = Sum_{k=0..2n-3} T(n,k) * T(n,k+3), with T given by A026519.
A027265
a(n) = Sum_{k=0..2n-3} T(n,k) * T(n,k+3), with T given by A026519.
Terms
- a(0) =24a(1) =104a(2) =954a(3) =3786a(4) =33648a(5) =131264a(6) =1159844a(7) =4508580a(8) =39809076a(9) =154773696a(10) =1367463642a(11) =5323519838a(12) =47082494816a(13) =183586707648
External references
- oeis: A027265