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A156629 Column 4 of square array A156628. 2
1, 5, 28, 181, 1333, 11029, 101351, 1024949, 11320359, 135679037, 1754890039, 24375607333, 362034474975, 5727314152237, 96171016597079, 1708678290956405, 32029999992261615, 631834430396575613, 13084795597366612231 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..18.

CROSSREFS

Sequence in context: A324352 A006157 A179326 * A123776 A070779 A189487

Adjacent sequences:  A156626 A156627 A156628 * A156630 A156631 A156632

KEYWORD

nonn

AUTHOR

Paul D. Hanna, Feb 17 2009

EXTENSIONS

More terms from Paul D. Hanna, Feb 20 2009

STATUS

approved

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Last modified November 15 13:20 EST 2019. Contains 329149 sequences. (Running on oeis4.)