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

0,4

Links

Table of n, a(n) for n=0..31.

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

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

Mathematica

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

Crossrefs

Sequence in context: A164270 A182820 A001794 * A133107 A178851 A213163

Adjacent sequences: A140286 A140287 A140288 * A140290 A140291 A140292

Keyword

sign,easy

Author

Paul Curtz, May 24 2008

Extensions

More terms from Colin Barker, Jul 10 2012

Status

approved