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A161440 Numbers m such that A160700(m) = 0. 17
0, 17, 34, 51, 68, 85, 102, 119, 136, 153, 170, 187, 204, 221, 238, 255, 257, 272, 291, 306, 325, 340, 359, 374, 393, 408, 427, 442, 461, 476, 495, 510, 514, 531, 544, 561, 582, 599, 612, 629, 650, 667, 680, 697, 718, 735, 748, 765, 771, 786, 801, 816, 839 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
LINKS
Charles R Greathouse IV, Table of n, a(n) for n = 1..10000
FORMULA
16n - 16 <= a(n) <= 16n - 1. - Charles R Greathouse IV, Jan 25 2018
MATHEMATICA
b[n_] := b[n] = If[n < 16, n, b[Floor[n/16]]~BitXor~Mod[n, 16]];
Select[Range[0, 1000], b[#] == 0&] (* Jean-François Alcover, Dec 01 2021 *)
PROG
(PARI) A160700(n)=my(t=n%16); while(n>15, n>>=4; t=bitxor(t, n%16)); t
a(n)=for(k=16*n-16, 16*n-1, if(a(k)==0, return(k))) \\ Charles R Greathouse IV, Jan 25 2018
CROSSREFS
Cf. A160700.
Sequence in context: A013577 A234942 A044857 * A044902 A048843 A008599
KEYWORD
nonn,easy
AUTHOR
Reinhard Zumkeller, Jun 10 2009
STATUS
approved

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Last modified June 17 23:38 EDT 2024. Contains 373468 sequences. (Running on oeis4.)