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A136731 Column 1 of square array A136730. 2
1, 2, 5, 23, 175, 1935, 28432, 523290, 11587072, 299942890, 8886126540, 296438370794, 10993731095695, 448604373236731, 19971257117211555, 963142501803505255, 50015707804752012825, 2782336529985704607295 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..17.

CROSSREFS

Cf. A136730; A101482, A136732.

Sequence in context: A191600 A343020 A167142 * A257030 A062495 A158889

Adjacent sequences:  A136728 A136729 A136730 * A136732 A136733 A136734

KEYWORD

nonn

AUTHOR

Paul D. Hanna, Jan 19 2008

STATUS

approved

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Last modified May 18 19:58 EDT 2021. Contains 344002 sequences. (Running on oeis4.)