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A324727 Odd numbers such that 2n is equal to A318466(n), bitor(2*n,sigma(n)), where bitor is A003986. 7
3, 7, 15, 21, 31, 55, 57, 63, 93, 105, 111, 127, 171, 189, 201, 213, 215, 217, 231, 237, 249, 253, 255, 315, 351, 357, 363, 369, 381, 393, 447, 465, 469, 473, 483, 489, 497, 501, 511, 651, 705, 747, 759, 789, 813, 831, 833, 879, 889, 895, 917, 959, 987, 989, 1001, 1015, 1023, 1155, 1365, 1377, 1407, 1467, 1491, 1503, 1505, 1515, 1533, 1595 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Antti Karttunen, Table of n, a(n) for n = 1..20000

Index entries for sequences related to binary expansion of n

Index entries for sequences where any odd perfect numbers must occur

Index entries for sequences related to sigma(n)

PROG

(PARI) for(n=1, oo, if((n%2)&&((2*n)==bitor(2*n, sigma(n))), print1(n, ", ")));

CROSSREFS

Odd terms of A324726.

Cf. A000203, A003986, A318466, A324647, A324718, A324719.

Sequence in context: A121712 A175544 A139208 * A320026 A146435 A046932

Adjacent sequences:  A324724 A324725 A324726 * A324728 A324729 A324730

KEYWORD

nonn

AUTHOR

Antti Karttunen, Mar 15 2019

STATUS

approved

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Last modified March 28 07:59 EDT 2020. Contains 333079 sequences. (Running on oeis4.)