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 A097643 #3 Mar 30 2012 17:37:42 %S A097643 4,46,478,944 %N A097643 Numbers n such that n=(d_1!!+d_2!!+...+d_k!!)-(d_1+d_2+...+d_k) where d_1 d_2 ... d_k is the decimal expansion of n. %e A097643 944 is in the sequence because 944=(9!!+4!!+4!!)-(9+4+4). %Y A097643 Cf. A097642. %K A097643 fini,full,base,nonn %O A097643 1,1 %A A097643 _Farideh Firoozbakht_, Aug 23 2004