a(n) = Sum_{k=0..2n-3} T(n,k) * T(n,k+3), with T given by A025177.
A027260
a(n) = Sum_{k=0..2n-3} T(n,k) * T(n,k+3), with T given by A025177.
Terms
- a(0) =24a(1) =232a(2) =2136a(3) =19282a(4) =172316a(5) =1531362a(6) =13566288a(7) =119972214a(8) =1059985776a(9) =9361450868a(10) =82670528056a(11) =730149455646
External references
- oeis: A027260