A156078 a(n) = #{1 <= k <= ceiling(n/2) : A000002(2k) = 1}.

0, 0, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 4, 4, 4, 4, 5, 5, 6, 6, 6, 6, 6, 6, 7, 7, 7, 7, 8, 8, 9, 9, 9, 9, 9, 9, 10, 10, 10, 10, 10, 10, 11, 11, 12, 12, 12, 12, 13, 13, 13, 13, 13, 13, 14, 14, 14, 14, 14, 14, 15, 15, 15, 15, 16, 16, 17, 17, 17, 17, 17, 17, 18, 18, 19, 19, 19, 19, 20, 20

Offset

1,9

Links

Table of n, a(n) for n=1..82.

Crossrefs

Sequence in context: A096605 A189671 A109497 * A123919 A194324 A194328

Adjacent sequences: A156075 A156076 A156077 * A156079 A156080 A156081

Keyword

nonn

Author

Benoit Cloitre, Feb 03 2009

Status

approved