A156562 a(n) = (-1)^n*Sum_{k=1..n} A054353(k)*(-1)^k.

1, 2, 3, 3, 4, 5, 5, 7, 7, 8, 9, 10, 10, 11, 12, 12, 13, 14, 15, 15, 17, 16, 18, 18, 19, 20, 21, 21, 22, 23, 23, 24, 25, 25, 27, 27, 28, 29, 30, 30, 31, 32, 32, 34, 34, 35, 36, 36, 37, 38, 38, 39, 40, 41, 41, 43, 43, 44, 44, 46, 45, 48, 47, 49, 49, 51, 50, 52

Offset

1,2

Links

Jinyuan Wang, Table of n, a(n) for n = 1..1000

Crossrefs

Cf. A054353, A156563.

Sequence in context: A337600 A238746 A272611 * A290736 A007998 A203899

Adjacent sequences: A156559 A156560 A156561 * A156563 A156564 A156565

Keyword

nonn

Author

Benoit Cloitre, Feb 10 2009

Status

approved