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A027141 a(n) = Sum_{k=0..2n-1} T(n,k) * T(n,k+1), with T given by A027113. 0
3, 23, 165, 1218, 9247, 71688, 564759, 4506005, 36324407, 295341956, 2418783687, 19932773439, 165151576215, 1374850036253, 11493442158373, 96443092570534, 811995039077311, 6857352935798972, 58071096513853991, 493014496906492215, 4195315394988567303 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..21.

CROSSREFS

Sequence in context: A037796 A331723 A212395 * A002398 A110065 A002816

Adjacent sequences:  A027138 A027139 A027140 * A027142 A027143 A027144

KEYWORD

nonn

AUTHOR

Clark Kimberling

EXTENSIONS

More terms from Sean A. Irvine, Oct 23 2019

STATUS

approved

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Last modified August 17 12:09 EDT 2022. Contains 356189 sequences. (Running on oeis4.)