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 A364659 #11 Aug 01 2023 11:16:09 %S A364659 1,2,61,62,73,74,133,134,145,146,193,194,253,254,313,397,398,403,457, %T A364659 458,481,482,493,494,523,553,554,565,566,613,614,625,626,661,662,673, %U A364659 674,691,733,734,757,758,763,793,794,817,818,853,854,913,914,943,973,974,997,998 %N A364659 Numbers k such that sigma(k) < sigma(k+1) < sigma(k+2). %H A364659 Seiichi Manyama, <a href="/A364659/b364659.txt">Table of n, a(n) for n = 1..10000</a> %o A364659 (PARI) isok(n) = sigma(n)<sigma(n+1) && sigma(n+1)<sigma(n+2); %Y A364659 Cf. A053224, A364657, A364662. %K A364659 nonn,easy %O A364659 1,2 %A A364659 _Seiichi Manyama_, Aug 01 2023