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 A249611 #6 Nov 03 2014 10:47:00 %S A249611 2,3,4,5,6,7,8,9,10,11,12,13,14,15,17,18,22,23,24,27,28,29,30,34,37, %T A249611 38,39,40,51,55,56,59,60,65,66,70,71,72,75,78,83,84,85,86,87,89,90,94, %U A249611 95,107,108,109,110,111,113,114,117,118,120,123,124,131,132 %N A249611 Integers that reach the (15, 8) cycle described in A234534, after iterations of numerator(sigma(n)/n) = A017665(n). %o A249611 (PARI) finalc(x, v) = {while (!vecsearch(v, x), x = numerator(sigma(x)/x)); x;} %o A249611 lista(nn, targ=15) = {v = [8, 127, 512, 29127]; for (i=2, nn, if (finalc(i, v) == targ, print1(i, ", ")););} %Y A249611 Cf. A017665, A234534, A249612, A249613, A249614. %K A249611 nonn %O A249611 1,1 %A A249611 _Michel Marcus_, Nov 02 2014