A156724 a(n)=A156253(2n)-A156251(2n)

1, 1, 1, 3, 3, 3, 3, 5, 5, 5, 7, 7, 9, 9, 9, 9, 11, 11, 13, 13, 13, 15, 15, 17, 17, 17, 17, 19, 19, 19, 21, 21, 21, 21, 23, 23, 25, 25, 27, 27, 27, 27, 27, 29, 29, 31, 31, 31, 31, 31, 33, 33, 35, 35, 37, 37, 37, 37, 39, 39, 39, 41, 41, 41, 43, 43, 43, 43, 45, 45, 45, 47, 47, 49, 49

Offset

1,4

Comments

a(n) is odd.

Links

Table of n, a(n) for n=1..75.

Formula

a(n) is expected to be asymptotic to 2n/3.

Crossrefs

Sequence in context: A352226 A129756 A339971 * A196186 A075753 A006166

Adjacent sequences: A156721 A156722 A156723 * A156725 A156726 A156727

Keyword

nonn

Author

Benoit Cloitre, Feb 14 2009

Status

approved