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A156724
a(n)=A156253(2n)-A156251(2n)
0
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.
FORMULA
a(n) is expected to be asymptotic to 2n/3.
CROSSREFS
Sequence in context: A352226 A129756 A339971 * A196186 A075753 A006166
KEYWORD
nonn
AUTHOR
Benoit Cloitre, Feb 14 2009
STATUS
approved