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 A370123 #6 Feb 10 2024 18:53:47 %S A370123 0,1,2,3,5,7,11,13,14,15,17,19,23,24,27,29,31,33,37,40,41,43,47,48,49, %T A370123 50,51,53,54,56,59,60,61,65,67,68,69,71,73,77,79,81,83,86,89,91,97,98, %U A370123 101,103,104,107,108,109,113,122,123,127,131,132,133,135,136,137,139,140,141,149,150,151,152,155,157,158 %N A370123 Numbers whose second arithmetic derivative (A068346) is a multiple of 3. %o A370123 (PARI) \\ See A370122. %Y A370123 Cf. A068346, A370119 (subsequence), A370122 (characteristic function). %K A370123 nonn %O A370123 1,3 %A A370123 _Antti Karttunen_, Feb 10 2024