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A233532 Second column of triangle A233530. 4
1, 2, 3, 8, 38, 268, 2578, 31672, 475120, 8427696, 172607454, 4008441848, 104061288740, 2985810416824, 93812980749076, 3202899902480872, 118054380417848192, 4671653916923940952, 197528462484409468792, 8886812830338447522120, 423862241146246310158108, 21362480654281867734050272 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..22.

CROSSREFS

Cf. A233530, A233531, A233533, A233534, A233535.

Sequence in context: A041789 A174899 A201370 * A093908 A007119 A064794

Adjacent sequences:  A233529 A233530 A233531 * A233533 A233534 A233535

KEYWORD

nonn

AUTHOR

Paul D. Hanna, Dec 14 2013

STATUS

approved

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Last modified January 20 11:11 EST 2020. Contains 331083 sequences. (Running on oeis4.)