A334873 a(n) = A329697(n) * A334204(n).

0, 0, 1, 0, 2, 1, 2, 0, 6, 2, 4, 1, 4, 2, 4, 0, 4, 6, 9, 2, 9, 4, 12, 1, 6, 4, 9, 2, 9, 4, 6, 0, 15, 4, 12, 6, 12, 9, 18, 2, 8, 9, 20, 4, 15, 12, 16, 1, 16, 6, 8, 4, 12, 9, 12, 2, 16, 9, 12, 4, 9, 6, 8, 0, 18, 15, 20, 4, 20, 12, 32, 6, 15, 12, 21, 9, 28, 18, 24, 2, 20, 8, 18, 9, 12, 20, 24, 4, 18, 15, 20, 12, 20

Offset: 1

Author

Antti Karttunen, Jun 09 2020

Keywords

• nonn

Links

• Antti Karttunen, Table of n, a(n) for n = 1..65537
• Index entries for sequences related to binary expansion of n

Crossrefs

Cf. A163511, A329697, A334204, A334867.

Cf. A000079 (positions of zeros); It is also conjectured that A007283 gives the positions of ones, and that A070875 gives the indices of twos.

Programs

PARI

A334873(n) = (A329697(n) * A334204(n));

Formula

a(n) = A329697(n) * A334204(n) = A329697(n) * A329697(A163511(n)).