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 A228372 #9 Nov 10 2017 09:23:20 %S A228372 1,3,5,6,8,12,14,16,19,23,27,29,31,37,38,40,42,46,52,56,58,60,62,69, %T A228372 71,73,79,85,89,93,95,103,104,108,110,114,120,122,128,130,132,142,144, %U A228372 148,153,155,161,165,167,173,183,185,189,193,195,201,209,212,214,224,226 %N A228372 Number of nontrivial divisors in the first n composites. %C A228372 Also, positions where values change in A228363. %C A228372 Partial sums of A144925. %H A228372 Harvey P. Dale, <a href="/A228372/b228372.txt">Table of n, a(n) for n = 1..10000</a> %t A228372 Accumulate[DivisorSigma[0,#]-2&/@Select[Range[100],CompositeQ]] (* _Harvey P. Dale_, Nov 10 2017 *) %o A228372 (PARI) L=listcreate();for(n=1,1000,if(!isprime(n),listput(L,n)));co=Vec(L);s=0;for(n=2,100,s=s+numdiv(co[n])-2;print1(s,",")) %K A228372 nonn %O A228372 1,2 %A A228372 _Ralf Stephan_, Aug 21 2013