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 #10 Mar 20 2016 12:55:03
%S 1,2,3,6,8,9,11,13,18,20,22,23,24,25,26,27,28,31,32,33,35,37,39,46,47,
%T 49,50,54,59,60,62,66,68,69,70,71,72,74,75,76,78,80,81,83,84,85,88,89,
%U 93,94,95,96,97,98,99,104,105,107,109,111,112,116,117,118,119,121,128,131,133,138,139,141,142,143,145,147,150
%N Numbers n such that n and A048673(n) are of the same parity.
%C Union of odd terms of A246261 and even terms of A246263.
%H Antti Karttunen, <a href="/A269860/b269860.txt">Table of n, a(n) for n = 1..10000</a>
%t f[n_] := (Times @@ Power[If[# == 1, 1, NextPrime@ #] & /@ First@ #, Last@ #] + 1)/2 &@ Transpose@ FactorInteger@ n; Select[Range@ 150, Xor[EvenQ@ f@ #, OddQ@ #] &] (* _Michael De Vlieger_, Mar 17 2016 *)
%o (Scheme, with _Antti Karttunen_'s IntSeq-library)
%o (define A269860 (ZERO-POS 1 1 (lambda (n) (- (A000035 n) (A000035 (A048673 n))))))
%Y Complement: A269861.
%Y Cf. A048674 (a subsequence).
%Y Cf. A000035, A048673, A246261, A246263.
%Y Cf. also A270430.
%K nonn
%O 1,2
%A _Antti Karttunen_, Mar 16 2016