This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A025185 #9 Jul 28 2016 15:36:31 %S A025185 1,2,16,120,946,7644,62832,522804,4390056,37126830,315770676, %T A025185 2698179488,23144461368,199177780102,1718891656176,14869867516812, %U A025185 128909380154562,1119623594699610,9740452802251080,84865206568065000,740387260555434996,6467129226550164474 %N A025185 a(n) = T(3n,n), where T is the array defined in A025177. %p A025185 A025185 := proc(n) %p A025185 A025177(3*n,n) ; %p A025185 end proc: # _R. J. Mathar_, Jul 28 2016 %K A025185 nonn %O A025185 0,2 %A A025185 _Clark Kimberling_