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 A364657 #12 Aug 01 2023 11:16:04 %S A364657 44,45,104,105,116,117,164,165,224,225,272,273,296,297,315,344,345, %T A364657 356,357,405,464,465,512,513,525,560,561,584,585,620,621,693,704,705, %U A364657 765,776,777,824,825,836,837,860,861,884,885,945,1004,1005,1112,1113,1125,1155 %N A364657 Numbers k such that sigma(k) > sigma(k+1) > sigma(k+2). %H A364657 Seiichi Manyama, <a href="/A364657/b364657.txt">Table of n, a(n) for n = 1..10000</a> %o A364657 (PARI) isok(n) = sigma(n)>sigma(n+1) && sigma(n+1)>sigma(n+2); %Y A364657 Cf. A050944, A053226, A364659. %K A364657 nonn,easy %O A364657 1,1 %A A364657 _Seiichi Manyama_, Aug 01 2023