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 A276716 #26 Feb 06 2017 03:46:13 %S A276716 1,2,3,4,5,6,7,8,9,2,2,6,8,10,12,14,16,18,20,4,6,4,10,12,14,16,18,20, %T A276716 22,6,8,10,6,14,16,18,20,22,24,8,10,12,14,8,18,20,22,24,26,10,12,14, %U A276716 16,18,10,22,24,26,28,12,14,16,18,20,22,12,26,28,30,14,16,18,20,22,24,26,14,30,32,16 %N A276716 a(n) = A007953(n)*A047726(n). %H A276716 Altug Alkan, <a href="/A276716/b276716.txt">Table of n, a(n) for n = 1..100000</a> %o A276716 (PARI) A047726(n) = n=eval(Vec(Str(n))); (#n)!/prod(i=0, 9, sum(j=1, #n, n[j]==i)!); %o A276716 A007953(n) = sumdigits(n); %o A276716 a(n) = A007953(n)*A047726(n); %Y A276716 Cf. A007953, A045876, A047726. %K A276716 nonn,base,look %O A276716 1,2 %A A276716 _Altug Alkan_, Sep 17 2016