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

%S 2,6,54,818,17360,472484,15666720,612024124,27510397296,1398077638344,

%T 79244353102992,4955659123743056,338912510632397056,

%U 25160982724710053792,2015185871050013302272,173192799533042315725008

%N Column 1 of triangle A152541.

%Y Cf. A152541, A152542, A152544.

%K nonn

%O 0,1

%A _Paul D. Hanna_, Dec 12 2008