A027254 a(n) = Sum_{k=0..n-2} T(n,k) * T(n,k+2), with T given by A026703.

1, 10, 62, 384, 1999, 11214, 55349, 298990, 1442299, 7649710, 36470860, 191481848, 906843279, 4732185974, 22320602389, 116024453570, 545848582951, 2830099408460, 13291841251589, 68795053937132, 322730986944375, 1668347808464146, 7820327627947825, 40392358720899832

Offset

2,2

Links

Table of n, a(n) for n=2..25.

Crossrefs

Sequence in context: A350644 A196632 A289799 * A370764 A159240 A268945

Adjacent sequences: A027251 A027252 A027253 * A027255 A027256 A027257

Keyword

nonn

Author

Clark Kimberling

Extensions

More terms from Sean A. Irvine, Oct 26 2019

Status

approved