A115821 - OEIS

A115821

Integers i such that 6*i XOR 15*i = 21*i.

0, 3, 6, 11, 12, 22, 24, 35, 43, 44, 47, 48, 70, 86, 88, 91, 94, 96, 139, 140, 171, 172, 175, 176, 182, 188, 192, 195, 278, 280, 291, 342, 344, 347, 350, 352, 363, 364, 376, 384, 387, 390, 547, 555, 556, 559, 560, 582, 683, 684, 687, 688, 694, 700, 704, 707

(list; graph; refs; listen; history; text; internal format)

OFFSET

0,2

COMMENTS

XOR is A003987.

LINKS

Paolo Xausa, Table of n, a(n) for n = 0..10000

Index entries for sequences defined by congruent products under XOR

MATHEMATICA

Select[Range[0, 1000], BitXor[6*#, 15*#] == 21*# &] (* Paolo Xausa, Sep 30 2024 *)

PROG

(PARI) is(n)=bitxor(6*n, 15*n)==21*n \\ Charles R Greathouse IV, Sep 25 2024