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 A369668 #9 Feb 08 2024 16:13:35 %S A369668 10,26,34,58,74,82,90,106,122,146,178,194,202,210,218,226,234,250,274, %T A369668 298,306,314,330,346,362,386,394,458,466,482,490,514,522,538,546,554, %U A369668 562,570,586,626,634,650,666,674,690,698,706,714,738,746,770,778,794,802,810,818,842,850,858,866,898,914,922,930,954 %N A369668 Numbers that have an even number of prime factors with multiplicity and whose arithmetic derivative is of the form 4k+3. %C A369668 All terms are of the form 4m+2 because if n has an even number of odd prime factors, then its arithmetic derivative A003415(n) is even. See A235991 and A235992. %H A369668 Antti Karttunen, <a href="/A369668/b369668.txt">Table of n, a(n) for n = 1..10000</a> %o A369668 (PARI) \\ See A369667. %Y A369668 Intersection of A028260 and A358774. %Y A369668 Intersection of A358774 and A369966. %Y A369668 Cf. A001222, A003415, A235991, A235992, A369667 (characteristic function). %Y A369668 Cf. also A369663. %K A369668 nonn %O A369668 1,1 %A A369668 _Antti Karttunen_, Feb 08 2024