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A047022 T(n,n), array T given by A047020. 0
1, 1, 2, 5, 19, 66, 227, 851, 3164, 11706, 44397, 168814, 641641, 2460264, 9462675, 36434340, 140822588, 545555490, 2116273293, 8226372157, 32029990809, 124856742546, 487360876726, 1904604296103, 7450351584876, 29172240231616 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Table of n, a(n) for n=0..25.

CROSSREFS

Sequence in context: A341878 A062122 A148435 * A148436 A148437 A106873

Adjacent sequences:  A047019 A047020 A047021 * A047023 A047024 A047025

KEYWORD

nonn

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified May 7 16:00 EDT 2021. Contains 343652 sequences. (Running on oeis4.)