A027304 a(n) = Sum_{k=0..floor((n-5)/2)} T(n,k) * T(n,k+1), with T given by A008315.

5, 14, 126, 384, 2355, 7568, 39545, 131768, 632177, 2162510, 9853892, 34384064, 151498203, 536917884, 2311543325, 8295107912, 35123988977, 127340511540, 532611748052, 1947506206400, 8069978842770, 29721855687264, 122273332182351, 453128454670472

Offset

5,1

Links

Table of n, a(n) for n=5..28.

Crossrefs

Cf. A008315.

Sequence in context: A283785 A267351 A058072 * A070135 A317037 A317691

Adjacent sequences: A027301 A027302 A027303 * A027305 A027306 A027307

Keyword

nonn

Author

Clark Kimberling

Extensions

More terms from Sean A. Irvine, Oct 26 2019

Status

approved