A046819 Number of 1's in binary expansion of 3n+2.

1, 2, 1, 3, 3, 2, 2, 4, 3, 4, 1, 3, 3, 3, 3, 5, 3, 4, 3, 5, 5, 2, 2, 4, 3, 4, 2, 4, 4, 4, 4, 6, 3, 4, 3, 5, 5, 4, 4, 6, 5, 6, 1, 3, 3, 3, 3, 5, 3, 4, 3, 5, 5, 3, 3, 5, 4, 5, 3, 5, 5, 5, 5, 7, 3, 4, 3, 5, 5, 4, 4, 6, 5, 6, 3, 5, 5, 5, 5, 7, 5, 6, 5, 7, 7, 2, 2, 4, 3, 4, 2, 4, 4

Offset

0,2

Links

Table of n, a(n) for n=0..92.

S. R. Finch, P. Sebah and Z.-Q. Bai, Odd Entries in Pascal's Trinomial Triangle (arXiv:0802.2654)

Formula

a(2n+1) = a(n) + 1, since 6n+5 = 2(3n+2)+1. - Ralf Stephan, Mar 05 2004

Crossrefs

Sequence in context: A306995 A212907 A308584 * A159945 A089216 A351599

Adjacent sequences: A046816 A046817 A046818 * A046820 A046821 A046822

Keyword

nonn

Author

N. J. A. Sloane

Status

approved