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 A097371 #10 Jan 26 2015 15:02:00
%S A097371 50,210,450,780,1500,3920,16500,91728,269500,493920,1293600,266378112,
%T A097371 317447424,1277337600,14948388000,48697248600,379748636467200
%N A097371 Numbers n such that n=(d_1+5)(d_2+5)*...*(d_k+5), where d_1 d_2 ... d_k is the decimal expansion of n.
%C A097371 All terms are even.
%C A097371 No other terms below 10^100. - _Max Alekseyev_, Jan 26 2015
%e A097371 317447424 is in the sequence because 317447424=(3+5)(1+5)(7+5)(4+5)(4+5)(7+5)(4+5)(2+5)(4+5).
%t A097371 Do[h=IntegerDigits[n];l=Length[h];If[n==Product[h[[k]]+5, {k, l}], Print[n]], {n, 800000000}]
%Y A097371 Cf. A097372, A098681.
%K A097371 base,nonn
%O A097371 1,1
%A A097371 _Farideh Firoozbakht_, Sep 20 2004
%E A097371 4 more terms from _Giovanni Resta_, Jan 13 2006