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 A324652 Numbers n such that A318468(n) (bitwise-AND of 2*n and sigma(n)) is equal to 2*n. 8
 6, 12, 18, 20, 24, 28, 36, 40, 48, 56, 80, 88, 96, 100, 104, 112, 160, 176, 192, 196, 200, 204, 208, 220, 224, 260, 264, 272, 304, 320, 336, 352, 368, 384, 392, 416, 448, 464, 496, 544, 550, 580, 608, 640, 648, 650, 672, 704, 736, 768, 784, 832, 896, 928, 992, 1032, 1040, 1044, 1056, 1060, 1068, 1088, 1104, 1120, 1184, 1216 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Positions of zeros in A324658, fixed points of A324659. Intersection with A324649 gives A324643. Intersection with A324726 gives A000396. In range 1 .. 2^32 there are only 22 odd terms. See A324647. LINKS Antti Karttunen, Table of n, a(n) for n = 1..20000 PROG (PARI) for(n=1, oo, if((n+n)==bitand(2*n, sigma(n)), print1(n, ", "))) CROSSREFS Cf. A000203, A191218, A318468, A324647, A324649, A324658, A324659, A324722, A324726. Some subsequences: A000396, A324643, A324647 (the odd terms). Sequence in context: A005835 A007620 A100715 * A205525 A094519 A088723 Adjacent sequences:  A324649 A324650 A324651 * A324653 A324654 A324655 KEYWORD nonn AUTHOR Antti Karttunen, Mar 14 2019 STATUS approved

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Last modified January 25 17:16 EST 2020. Contains 331245 sequences. (Running on oeis4.)