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 A373375 #11 Jun 03 2024 15:40:18 %S A373375 1,4,8,9,15,16,21,25,32,33,35,36,39,49,51,55,57,60,64,65,69,72,77,81, %T A373375 84,85,87,91,93,95,100,111,115,119,120,121,123,128,129,132,133,135, %U A373375 140,141,143,144,145,155,156,159,161,168,169,177,183,185,187,189,196,200,201,203,204,205,209,213,215,217,219,220,221 %N A373375 Numbers whose sum of prime factors (with repetition, A001414) and arithmetic derivative (A003415) are both even. %C A373375 Numbers k such that sopfr(k) and k' are both even. %C A373375 A multiplicative semigroup; if m and n are in the sequence then so is m*n. %H A373375 Antti Karttunen, <a href="/A373375/b373375.txt">Table of n, a(n) for n = 1..10000</a> %o A373375 (PARI) isA373375 = A373374; %Y A373375 Intersection of A036349 and A235992. %Y A373375 Disjoint union of A345452 and 8*A345452. %Y A373375 Positions of even terms in A373364. %Y A373375 Cf. A001414, A003415, A373374 (characteristic function), A373376 (complement). %K A373375 nonn %O A373375 1,2 %A A373375 _Antti Karttunen_, Jun 03 2024