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 A324659 a(n) = (1/2)*A318468(n), where A318468(n) is bitwise-AND of 2*n and sigma(n). 4
 0, 0, 2, 0, 1, 6, 4, 0, 0, 8, 2, 12, 5, 12, 12, 0, 1, 18, 2, 20, 16, 18, 4, 24, 9, 16, 16, 28, 13, 4, 16, 0, 0, 2, 0, 36, 1, 6, 4, 40, 1, 32, 2, 40, 37, 36, 8, 48, 16, 34, 32, 48, 17, 52, 36, 56, 40, 40, 26, 20, 29, 48, 52, 0, 0, 64, 2, 4, 0, 64, 4, 64, 1, 8, 10, 68, 0, 68, 8, 80, 16, 18, 2, 80, 20, 66, 20, 88, 9, 80 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,3 LINKS Antti Karttunen, Table of n, a(n) for n = 1..16384 FORMULA a(n) = A318468(n)/2. a(n) = n - A324658(n). PROG (PARI) A324659(n) = (bitand(2*n, sigma(n))/2); CROSSREFS Cf. A000203, A004198, A318458, A318468, A324648, A324658. Cf. A324652 (fixed points). Sequence in context: A175197 A059299 A128722 * A304485 A289537 A323837 Adjacent sequences:  A324656 A324657 A324658 * A324660 A324661 A324662 KEYWORD nonn AUTHOR Antti Karttunen, Mar 14 2019 STATUS approved

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Last modified January 28 07:07 EST 2020. Contains 331317 sequences. (Running on oeis4.)