A155980 First differences of A135351.

0, 2, -2, 3, -1, 5, 3, 13, 19, 45, 83, 173, 339, 685, 1363, 2733, 5459, 10925, 21843, 43693, 87379, 174765, 349523, 699053, 1398099, 2796205, 5592403, 11184813, 22369619, 44739245, 89478483, 178956973, 357913939, 715827885, 1431655763, 2863311533, 5726623059

Offset: 0

Author

Paul Curtz, Feb 01 2009

Keywords

• sign
• easy

Links

• Paolo Xausa, Table of n, a(n) for n = 0..1000
• Index entries for linear recurrences with constant coefficients, signature (1,2).

Crossrefs

Cf. A135351.

Programs

Mathematica

LinearRecurrence[{1,2},{0,2,-2,3},50] (* Paolo Xausa, Nov 07 2023 *)

Formula

G.f.: (x^2-4*x+2)*x/((1-2*x)*(x+1)). - Alois P. Heinz, Jan 21 2021

Extensions

More terms from Alois P. Heinz, Jan 21 2021