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 A097655 #8 Dec 22 2014 14:55:09
%S A097655 1,2,3,15,18432,75600,276531978240000,4810168001497883738112000,
%T A097655 215788176336727572480000000,
%U A097655 2178419737991700039289327133392896000000000000
%N A097655 Numbers n such that n = d_1!!*d_2!!*...*d_k!! where d_1 d_2 ... d_k is the decimal expansion of n.
%C A097655 All terms are of the form 2^i*3^j*5^k*7^l.
%e A097655 18432 is in the sequence because 18432 = 1!!*8!!*4!!*3!!*2!!.
%t A097655 Do[h=IntegerDigits[n];l=Length[h];If[n==Product[h[[k]]!!, {k, l}], Print[n]], {n, 2000000000}]
%Y A097655 Cf. A097653, A097654, A097643, A102279.
%K A097655 base,nonn
%O A097655 1,2
%A A097655 _Farideh Firoozbakht_, Sep 10 2004
%E A097655 More terms from _Farideh Firoozbakht_, Jan 08 2005