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 A183557 #7 Apr 23 2022 16:22:47 %S A183557 0,1,3,7,15,37,71,159,303,681,1291,2887,5471,12237,23183,51839,98207, %T A183557 219601,416019,930247,1762287,3940597,7465175,16692639,31622991 %N A183557 Positions of records in A179319 for both positive and negative integers; A183555 and A183556 merged together. %Y A183557 Cf. A179319, A183555, A183556, A059973, A000201, A001950. %K A183557 nonn,more %O A183557 1,3 %A A183557 _Paul D. Hanna_, Jan 12 2011 %E A183557 Terms a(19) - a(25) were computed by _D. S. McNeil_, Dec 28 2010.