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 A140364 #5 Mar 30 2012 16:50:49 %S A140364 7,9,17,23,25,27,39,41,43,47,55,71,79,81,87,95,97,103,109,111,113,121, %T A140364 125,137,143,157,159,167,169,183,187,191,193,199,209,229,239,243,247, %U A140364 251,263,271,277,281,283,289,291,295,303,307,311,313,319,323,335,353,359,361,367 %N A140364 Values of e such that A139767 is 2. %C A140364 Can these numbers be described in any other way? %H A140364 N. J. A. Sloane, <a href="/A140364/b140364.txt">Table of n, a(n) for n = 1..292</a> %K A140364 nonn %O A140364 1,1 %A A140364 _N. J. A. Sloane_, Jun 16 2008