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 A066581 #2 Dec 05 2013 19:55:05 %S A066581 1,6,120,504,2,60,336,288,40320,15552,1837080,1327104,309657600, %T A066581 393750000,2015539200,94097687040,1366159011840,54793045278720, %U A066581 140587147048320,720,3024,120960,10321920,28343520,334430208 %N A066581 Product of nonzero digits of A066547(n). %e A066581 The third term of A066547 is 456 hence a(3) = 120. %Y A066581 Cf. A066547. %K A066581 easy,nonn,base %O A066581 1,2 %A A066581 _Amarnath Murthy_, Dec 21 2001 %E A066581 More terms from Antonio G. Astudillo (afg_astudillo(AT)lycos.com), Apr 01 2003