A366379 Numbers k such that A057889(k) != k (mod 3), where A057889 is the bijective bit-reverse.

11, 13, 22, 26, 35, 37, 41, 43, 44, 47, 49, 52, 53, 55, 59, 61, 70, 74, 82, 86, 88, 94, 98, 104, 106, 110, 118, 122, 131, 133, 137, 139, 140, 143, 145, 148, 149, 151, 155, 157, 161, 163, 164, 167, 169, 172, 173, 175, 176, 179, 181, 185, 187, 188, 191, 193, 196, 197, 199, 203, 205, 208, 209, 211, 212, 215, 217, 220

Offset: 1

Author

Antti Karttunen, Oct 22 2023

Keywords

• nonn

Crossrefs

Cf. A030101, A057889, A366378 (complement), A366389.

Subsequence of A001651, and of A057891.

Programs

PARI

A030101(n) = if(n<1,0,subst(Polrev(binary(n)),x,2));
A057889(n) = if(!n,n,A030101(n/(2^valuation(n,2))) * (2^valuation(n, 2)));
isA366379(n) = (!!((A057889(n)-n)%3));