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A169812 a(n) = n XOR d(n) (cf. A000005). 3
0, 0, 1, 7, 7, 2, 5, 12, 10, 14, 9, 10, 15, 10, 11, 21, 19, 20, 17, 18, 17, 18, 21, 16, 26, 30, 31, 26, 31, 22, 29, 38, 37, 38, 39, 45, 39, 34, 35, 32, 43, 34, 41, 42, 43, 42, 45, 58, 50, 52, 55, 50, 55, 62, 51, 48, 61, 62, 57, 48, 63, 58, 57, 71, 69, 74, 65, 66, 65, 78, 69, 68, 75, 78 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,4

LINKS

Amiram Eldar, Table of n, a(n) for n = 1..10000

MATHEMATICA

a[n_] := BitXor[n, DivisorSigma[0, n]]; Array[a, 100] (* Amiram Eldar, Jul 08 2019 *)

PROG

(PARI) a(n)=bitxor(n, numdiv(n)); \\ Michel Marcus, Jul 08 2019

CROSSREFS

Cf. A000005, A070883, A169810, A169811, A169813, A169814.

Sequence in context: A083871 A255272 A303658 * A195907 A126584 A318302

Adjacent sequences:  A169809 A169810 A169811 * A169813 A169814 A169815

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, May 28 2010

STATUS

approved

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Last modified February 16 15:17 EST 2020. Contains 331961 sequences. (Running on oeis4.)