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 A005661 M3779 #36 Mar 01 2024 09:35:52 %S A005661 5,8,12,14,21,22,26,33,39,40,42,50,60,63,64,75,76,78,82,96,98,114,117, %T A005661 118,123,124,126,147,148,150,154,162,177,186,189,190,194,222,225,226, %U A005661 231,232,234,243,244,246,250,285,291,292,294,298,306,322,339,348,351 %N A005661 k in S implies 2k-2, 3k-3 in S. %D A005661 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence). %H A005661 Seiichi Manyama, <a href="/A005661/b005661.txt">Table of n, a(n) for n = 1..10000</a> %H A005661 R. K. Guy, <a href="/A005658/a005658.pdf">Letter to N. J. A. Sloane with attachment, 1982</a> %e A005661 From _Seiichi Manyama_, Feb 29 2024: (Start) %e A005661 663, 994 and 1986 are terms and 1986 = 2*994 - 2 = 3*663 - 3. %e A005661 3159, 4738 and 9474 are terms and 9474 = 2*4738 - 2 = 3*3159 - 3. %e A005661 18711, 28066 and 56130 are terms and 56130 = 2*28066 - 2 = 3*18711 - 3. (End) %Y A005661 Cf. A005659. %K A005661 nonn %O A005661 1,1 %A A005661 _N. J. A. Sloane_ %E A005661 More terms from Larry Reeves (larryr(AT)acm.org), Oct 01 2001