A025185 a(n) = T(3n,n), where T is the array defined in A025177.

1, 2, 16, 120, 946, 7644, 62832, 522804, 4390056, 37126830, 315770676, 2698179488, 23144461368, 199177780102, 1718891656176, 14869867516812, 128909380154562, 1119623594699610, 9740452802251080, 84865206568065000, 740387260555434996, 6467129226550164474

Offset

0,2

Links

Table of n, a(n) for n=0..21.

Maple

A025185 := proc(n)
        A025177(3*n, n) ;
end proc: # R. J. Mathar, Jul 28 2016

Crossrefs

Sequence in context: A258683 A026129 A026158 * A090672 A200820 A209361

Adjacent sequences: A025182 A025183 A025184 * A025186 A025187 A025188

Keyword

nonn

Author

Clark Kimberling

Status

approved