%I
%S 1,18,255,3465,47880,687960,10372320,164656800,2754259200,48518870400,
%T 899026128000,17495593315200,356995102464000,7625049239808000,
%U 170196434343936000,3963602854987776000,96160451873181696000
%N Unsigned fourth column (k=3) of triangle A136656 divided by 8.
%C Also unsigned third column of triangle A136657 divided by 4.
%D Ch. A. Charalambides, Enumerative Combinatorics, Chapman & Hall/CRC, Boca Raton, Florida, 2002, Table 8.3, p. 311, with s=2, k=3 column/8.
%F a(n)= A136656(n+3,3)/8, n>=0.
%F E.g.f.(derived from the one given for the column k=3 under A136656): (2+18*x+3*x^212*x^3+3*x^4)/(2*(1x)^9).
%Y Cf. A136659 (column k=2), A136661 (column k=4).
%K nonn,easy
%O 0,2
%A _Wolfdieter Lang_ Feb 22 2008
