Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).
%I #13 Jul 17 2020 22:57:19
%S 1,2,3,5,7,9,11,13,15,17,19,21,23,27,29,31,33,37,39,41,43,45,47,49,51,
%T 53,57,59,61,63,67,69,71,73,77,79,81,83,87,89,91,93,97,99,101,103,107,
%U 109,111,113,117,119,123,127,129,131,133,135,137,139,141,147,149,151,153,157,159,161,163,167,169,171,173
%N Numbers k such that A122111(k) [the conjugated prime factorization of k] is a square or twice a square.
%C Sequence A122111(A028982(k)), k >= 1, sorted into ascending order.
%o (PARI) isA336119(n) = (A335909(n)); \\ See code in A335909.
%Y Cf. A000040, A066207 (subsequences), A335909 (characteristic function).
%Y Cf. A028982, A031215, A031368, A053866, A122111.
%Y Positions of odd terms in A323173, positions of zeros in A336120 and A336121, positions of ones in A336312.
%K nonn
%O 1,2
%A _Antti Karttunen_, Jul 14 2020