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 A140951 #6 Mar 30 2012 18:51:58 %S A140951 1,3,5,6,10,11,12,20,21,22,24,40,42,43,44,48,80,84,85,86,88,96,160, %T A140951 168,170,171,172,176,192,320,336,340,341,342,344,352,384,640 %N A140951 Based on Jacobsthal numbers. Increasing order of different positive terms of A140950. %C A140951 Two possibilities of triangle on line. 1) From 1: 1; 3, 5; 6, 10, 11; 12, 20, 21, 22; 24, 40, 42, 43, 44; . 2) After 1: 3; 5, 6; 10, 11, 12; 20, 21, 22, 24; . %F A140951 Also A140642 (1, 2, 3, 4, 5, 6, 8, 10, 11, 12, 16, 20) without A000079(n+1). Note position of A001045(n+2) terms: 0, 1, 2, 5, 8, 13 =A000982. See A140503 square . %K A140951 nonn,uned %O A140951 0,2 %A A140951 _Paul Curtz_, Jul 25 2008