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 A369656 #5 Feb 05 2024 18:07:33 %S A369656 6,10,22,27,30,34,42,50,58,66,70,78,82,86,99,105,114,118,122,125,126, %T A369656 130,142,146,154,165,174,182,194,202,206,207,214,222,230,231,238,242, %U A369656 243,246,250,255,273,274,279,282,285,286,298,302,310,318,326,333,343,345,346,357,358,366,369,370,374,382,385,386 %N A369656 Numbers k such that k' is odd and also k'' is odd, where k' stands for the arithmetic derivative of k, A003415(k). %C A369656 Numbers k that are in A235991 and also A003415(k) is in A235991. %o A369656 (PARI) \\ See A369655. %Y A369656 Cf. A000035, A003415, A068346, A235991, A351228, A369655 (characteristic function). %K A369656 nonn %O A369656 1,1 %A A369656 _Antti Karttunen_, Feb 05 2024