A156723 a(n)=A156253(n)-A156251(n)

0, 1, 0, 1, 0, 1, 2, 3, 2, 3, 4, 3, 4, 3, 4, 5, 4, 5, 4, 5, 6, 7, 6, 7, 8, 9, 8, 9, 8, 9, 10, 9, 10, 11, 12, 11, 12, 13, 12, 13, 12, 13, 14, 15, 14, 15, 16, 17, 16, 17, 18, 17, 18, 17, 18, 19, 18, 19, 18, 19, 20, 21, 20, 21, 22, 21, 22, 21, 22, 23, 22, 23, 24, 25, 24, 25, 26, 27, 26, 27

Offset

1,7

Comments

a(2n) is odd, a(2n+1) is even.

Links

Table of n, a(n) for n=1..80.

Formula

a(n) is expected to be asymptotic to n/3.

Crossrefs

Sequence in context: A324380 A123182 A069464 * A240834 A256993 A348192

Adjacent sequences: A156720 A156721 A156722 * A156724 A156725 A156726

Keyword

nonn

Author

Benoit Cloitre, Feb 14 2009

Status

approved