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A047018 T(n,n+3), array T given by A047010. 0
1, 4, 15, 55, 203, 756, 2835, 10698, 40590, 154711, 591998, 2272920, 8752198, 33787677, 130729863, 506821408, 1968360249, 7656736914, 29826609906, 116339203127, 454317156153, 1776063279485, 6950000821250, 27220990233570 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..23.

CROSSREFS

Sequence in context: A026013 A050183 A094375 * A064813 A183932 A009940

Adjacent sequences:  A047015 A047016 A047017 * A047019 A047020 A047021

KEYWORD

nonn

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified March 18 22:11 EDT 2019. Contains 321305 sequences. (Running on oeis4.)