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 A080324 #12 Aug 25 2023 08:51:36 %S A080324 1,2,6,10,14,15,21,22,26,30,33,34,35,38,39,42,46,51,55,57,58,62,65,66, %T A080324 69,70,74,77,78,82,85,86,87,91,93,94,95,102,106,110,111,114,115,118, %U A080324 119,122,123,129,130,133,134,138,141,142,143,145,146,154,155,158,159,161 %N A080324 Union of even squarefree numbers (A039956) and squarefree numbers for which the number of prime factors is even (A030229). %C A080324 k is a term of this sequence iff mu(k)^k > 0 respectively iff A080323(k) > 0. %Y A080324 Cf. A008683, A030229, A039956, A056912, A080323. %K A080324 nonn %O A080324 1,2 %A A080324 _Reinhard Zumkeller_, Feb 14 2003 %E A080324 Definition corrected by _Georg Fischer_ at the suggestion of _Amiram Eldar_, Aug 17 2023