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Column 2 of triangle A152391.
4

%I #2 Mar 30 2012 18:37:15

%S 1,3,8,40,216,1386,9552,71820,571440,4815778,42465144,391058720,

%T 3738272328,37015339410,378307524768,3983307781956,43109512918560,

%U 478808036794306,5448659044584680,63446989372749528,755057167559816440

%N Column 2 of triangle A152391.

%Y Cf. A152391; columns: A152392, A152393; A152395.

%K nonn

%O 0,2

%A _Paul D. Hanna_, Dec 11 2008