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 A369666 #8 Feb 06 2024 16:24:30 %S A369666 6,8,10,12,15,22,24,30,34,40,42,50,56,58,60,64,65,66,70,77,78,82,84, %T A369666 86,104,112,114,118,120,122,126,128,130,132,136,140,141,142,146,152, %U A369666 154,161,168,174,180,182,184,185,188,189,194,196,201,202,204,206,209,214,220,221,222,228,230,232,236,238,242,246,250 %N A369666 Numbers k > 1 for which A276085(A003415(k)) == k (mod 4), where A003415 is the arithmetic derivative, and A276085 is the primorial base log-function. %H A369666 Antti Karttunen, <a href="/A369666/b369666.txt">Table of n, a(n) for n = 1..10000</a> %o A369666 (PARI) \\ See A369665. %Y A369666 Cf. A003415, A276085, A369665 (characteristic function). %Y A369666 Cf. A369663 and A369664 (subsequences). %Y A369666 Cf. also A351228. %K A369666 nonn %O A369666 1,1 %A A369666 _Antti Karttunen_, Feb 06 2024