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 A383272 #19 Apr 23 2025 02:38:52 %S A383272 0,2,6,15,21,45,111,261,1605,1995,4935,8295,69825,268155,550725, %T A383272 4574955,12024855,39867135,398467245,1698754365,16351800465 %N A383272 Positions of records in A383271. %C A383272 Using A322743, a(22) <= 72026408685 and, if it is equal, a(23) <= 120554434875. %Y A383272 Base-2 analog of A276694. %Y A383272 Cf. A383271, A322743. %K A383272 nonn,base %O A383272 1,2 %A A383272 _Michael S. Branicky_, Apr 21 2025