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 A084926 #6 Jul 10 2015 19:33:38 %S A084926 5,7,9,11,13,15,17,19,21,23,25,26,27,29,31,33,34,35,37,39,41,43,45,47, %T A084926 49,51,53,55,56,57,59,61,63,64,65,67,69,71,73,75,76,77,79,81,83,85,86, %U A084926 87,89,91,93,94,95,97,99,101,103,105,107,109,111,113,115,116,117,118 %N A084926 Inverse hyperbolic cotangent reducible numbers. The hyperbolic analog of the non-Stormer numbers (A002312). %C A084926 n is in the sequence if y=(xn+1)/(x+n) is an integer for some integer x where 1<x<n. %o A084926 (PARI) for(n=1,120,x=1; b=0; while(x<n,x=x+1; r=(x+n)*floor((x*n+1)/(x+n)); if(r>=(x*n+1),b=b+1)); if(b>0,print1(n,","))) %Y A084926 Cf. A002312 (non-Stormer numbers), A084925 (arccoth irreducible). %K A084926 nonn %O A084926 1,1 %A A084926 _Paul D. Hanna_, Jun 12 2003