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A026982 a(n) = Sum_{k=0..n-1} T(n,k) * T(n,k+1), with T given by A026670. 0
1, 6, 24, 120, 460, 2214, 8475, 40164, 154235, 724742, 2792579, 13050280, 50432693, 234766510, 909442512, 4221139640, 16384219216, 75873259406, 294977735364, 1363503281324, 5308113306398, 24499364386598, 95483014454706, 440147035814920, 1717035728143720, 7906666535747934 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..26.

CROSSREFS

Sequence in context: A127917 A293118 A293121 * A051197 A334328 A324064

Adjacent sequences: A026979 A026980 A026981 * A026983 A026984 A026985

KEYWORD

nonn

AUTHOR

Clark Kimberling

EXTENSIONS

More terms from Sean A. Irvine, Oct 20 2019

STATUS

approved

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Last modified November 29 13:01 EST 2022. Contains 358429 sequences. (Running on oeis4.)