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A027232 a(n) = Sum_{k=0..n-1} T(n,k) * T(n,k+1), with T given by A026758. 0
1, 4, 19, 72, 355, 1347, 6843, 26077, 135752, 519336, 2760110, 10591394, 57299551, 220393887, 1210772453, 4665698732, 25974365600, 100243916036, 564517479641, 2181476412875, 12407767954139, 48002072364351, 275392803316254, 1066512702720864, 6164746100658825, 23896975393255717 (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: A268214 A027208 A085348 * A256714 A110688 A218920

Adjacent sequences:  A027229 A027230 A027231 * A027233 A027234 A027235

KEYWORD

nonn

AUTHOR

Clark Kimberling

EXTENSIONS

More terms from Sean A. Irvine, Oct 24 2019

STATUS

approved

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Last modified September 26 17:30 EDT 2021. Contains 347670 sequences. (Running on oeis4.)