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A318467 a(n) = 2*n XOR A000203(n), where XOR is bitwise-xor (A003987) and A000203 = sum of divisors. 6
3, 7, 2, 15, 12, 0, 6, 31, 31, 6, 26, 4, 20, 4, 6, 63, 48, 3, 50, 2, 10, 8, 54, 12, 45, 30, 30, 0, 36, 116, 30, 127, 114, 114, 118, 19, 108, 112, 118, 10, 120, 52, 122, 12, 20, 20, 110, 28, 91, 57, 46, 10, 92, 20, 38, 8, 34, 46, 74, 208, 68, 28, 22, 255, 214, 20, 194, 246, 234, 28, 198, 83, 216, 230, 234, 20, 250, 52, 206, 26 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Antti Karttunen, Table of n, a(n) 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) = A003987(2*n, A000203(n)).

a(n) = A224880(n) - 2*A318468(n).

PROG

(PARI) A318467(n) = bitxor(2*n, sigma(n));

CROSSREFS

Cf. A000203, A003987, A318466, A318468.

Cf. A000396 (positions of zeros).

Cf. also A294899, A318457.

Sequence in context: A260421 A237427 A210203 * A324713 A245611 A063041

Adjacent sequences:  A318464 A318465 A318466 * A318468 A318469 A318470

KEYWORD

nonn,base

AUTHOR

Antti Karttunen, Aug 26 2018

STATUS

approved

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Last modified December 12 07:31 EST 2019. Contains 329948 sequences. (Running on oeis4.)