A027987 a(n) = Sum{T(n,k)*T(n,k+3)}, 0<=k<=2n-3, T given by A027960.

58, 272, 1154, 4757, 19378, 78422, 315994, 1269270, 5086294, 20345092, 81265106, 324240331, 1292556986, 5149091916, 20500830986, 81586994576, 324577199086, 1290904257426, 5133037194706, 20407032157936, 81119882902118

Offset

3,1

Links

Table of n, a(n) for n=3..23.

Crossrefs

Sequence in context: A305156 A334186 A051972 * A141779 A250927 A250920

Adjacent sequences: A027984 A027985 A027986 * A027988 A027989 A027990

Keyword

nonn

Author

Clark Kimberling

Status

approved