A140289 First quadrisection of A140287.

0, 0, 1, -7, 32, -120, 401, -1247, 3712, -10800, 31201, -90487, 264992, -784680, 2345201, -7051727, 21263872, -64145760, 193310401, -581652967, 1747480352, -5243918040, 15725054801, -47140982207, 141319714432, -423717125520, 1270699466401, -3811500847447, 11434371886112, -34305580792200, 102927256193201, -308811498176687

Offset: 0

Author

Paul Curtz, May 24 2008

Keywords

• sign
• easy

Links

• Index entries for linear recurrences with constant coefficients, signature (-7,-17,-15).

Programs

Mathematica

LinearRecurrence[{-7,-17,-15},{0,0,1},40] (* Harvey P. Dale, Mar 16 2015 *)

Formula

a(n)=-7a(n-1)-17a(n-2)-15a(n-3).

G.f.: x^2/((3*x + 1)*(5*x^2 + 4*x + 1)). - Colin Barker, Jul 10 2012

Extensions

More terms from Colin Barker, Jul 10 2012