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A089976 Row sums of triangle A089975. 1
1, 1, 2, 4, 8, 20, 52, 146, 458, 1498, 5240, 19562, 76006, 311258, 1334108, 5931250, 27492122, 132096626, 655783888, 3368747018, 17837850110, 97228103482, 545514383396, 3142793126018 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

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

CROSSREFS

Sequence in context: A078160 A218088 A222320 * A000980 A123611 A082279

Adjacent sequences:  A089973 A089974 A089975 * A089977 A089978 A089979

KEYWORD

easy,nonn

AUTHOR

Paul Boddington, Nov 17 2003

STATUS

approved

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Last modified June 23 08:56 EDT 2021. Contains 345395 sequences. (Running on oeis4.)