A137173 A006516 at positions with even indices, A007582 at positions with odd indices.

0, 1, 1, 3, 6, 10, 28, 36, 120, 136, 496, 528, 2016, 2080, 8128, 8256, 32640, 32896, 130816, 131328, 523776, 524800, 2096128, 2098176, 8386560, 8390656, 33550336, 33558528, 134209536, 134225920, 536854528, 536887296, 2147450880, 2147516416

Offset: 0

Author

Paul Curtz, May 11 2008

Keywords

• nonn
• easy

Formula

a(2n)=A006516(n). a(2n+1)=A007582(n).

a(2n)+a(2n+1) = A000302(n). a(2n+1)-a(2n)=A000079(n).

G.f.: -x*(-1-x+3*x^2) / ( (2*x+1)*(2*x-1)*(2*x^2-1) ). - R. J. Mathar, Nov 22 2018

Extensions

Edited by R. J. Mathar, Jul 16 2008