A140290 Fourth quadrisection of A140287.

-1, 2, -4, 9, -25, 82, -284, 969, -3185, 10082, -30964, 93129, -276745, 818482, -2421644, 7188489, -21428705, 64121282, -192388324, 578087049, -1737827065, 5223134482, -15690187004, 47105428809, -141351839825, 424023394082, -1271763913684

Offset: 0

Author

Paul Curtz, May 24 2008

Keywords

• sign
• easy

Links

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

Crossrefs

Cf. A127055; .

Formula

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

G.f.: -(7*x^2+5*x+1)/((3*x+1)*(5*x^2+4*x+1)). - Colin Barker, Jul 10 2012

Extensions

More terms from Colin Barker, Jul 10 2012