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A027987 a(n) = Sum{T(n,k)*T(n,k+3)}, 0<=k<=2n-3, T given by A027960. 0
58, 272, 1154, 4757, 19378, 78422, 315994, 1269270, 5086294, 20345092, 81265106, 324240331, 1292556986, 5149091916, 20500830986, 81586994576, 324577199086, 1290904257426, 5133037194706, 20407032157936, 81119882902118 (list; graph; refs; listen; history; text; internal format)
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

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Last modified May 15 07:17 EDT 2021. Contains 343909 sequences. (Running on oeis4.)