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A324648 a(n) = n - A318458(n), where A318458(n) is bitwise-AND of n and the sum of proper divisors of n (sigma(n)-n). 4
1, 2, 2, 4, 4, 0, 6, 8, 9, 2, 10, 12, 12, 4, 6, 16, 16, 2, 18, 0, 20, 16, 22, 24, 25, 10, 18, 0, 28, 20, 30, 32, 32, 34, 34, 0, 36, 32, 38, 8, 40, 8, 42, 4, 12, 36, 46, 48, 49, 16, 34, 16, 52, 52, 38, 56, 40, 26, 58, 16, 60, 28, 22, 64, 64, 0, 66, 68, 68, 4, 70, 0, 72, 66, 74, 12, 76, 4, 78, 16, 81, 82, 82, 80, 64, 80, 86, 0, 88 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Antti Karttunen, Table of n, a(n) for n = 1..16384

Antti Karttunen, Data supplement: n, a(n) computed for n = 1..65537

Index entries for sequences related to binary expansion of n

Index entries for sequences related to sigma(n)

FORMULA

a(n) = n - A318458(n).

PROG

(PARI)

A318458(n) = bitand(n, sigma(n)-n);

A324648(n) = (n-A318458(n));

(PARI) A324648(n) = (n-bitand(n, sigma(n)-n));

CROSSREFS

Cf. A001065, A004198, A318458, A324658, A324649 (positions of zeros).

Sequence in context: A054529 A074934 A089886 * A071511 A119922 A097860

Adjacent sequences:  A324645 A324646 A324647 * A324649 A324650 A324651

KEYWORD

nonn,look

AUTHOR

Antti Karttunen, Mar 14 2019

STATUS

approved

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Last modified January 18 05:09 EST 2020. Contains 330995 sequences. (Running on oeis4.)