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 A369966 #10 Feb 08 2024 16:13:44 %S A369966 6,10,14,22,26,34,38,46,54,58,62,74,82,86,90,94,106,118,122,126,134, %T A369966 142,146,150,158,166,178,194,198,202,206,210,214,218,226,234,250,254, %U A369966 262,274,278,294,298,302,306,314,326,330,334,342,346,350,358,362,382,386,390,394,398,414,422,446,454,458,462,466 %N A369966 Numbers of the form 4m+2 that have an even number of prime factors with multiplicity. %C A369966 Numbers that have one even prime factor (2) and an odd number of odd prime factors with multiplicity. %C A369966 Numbers that have an even number of prime factors with multiplicity and whose arithmetic derivative (A003415) is odd. %H A369966 Antti Karttunen, <a href="/A369966/b369966.txt">Table of n, a(n) for n = 1..10000</a> %F A369966 a(n) = 2*A067019(n). %o A369966 (PARI) \\ See A369965 %Y A369966 Intersection of A016825 and A028260. %Y A369966 Intersection of A028260 and A235991. %Y A369966 Cf. A003415, A067019, A369668 (subsequence), A369965 (characteristic function). %Y A369966 Cf. A369661 (numbers whose arithmetic derivative is in this sequence). %K A369966 nonn %O A369966 1,1 %A A369966 _Antti Karttunen_, Feb 08 2024