A094836 a(n) = 2702*a(n-1) - a(n-2); a(-1) = -15; a(0) = 15.

-15, 15, 40545, 109552575, 296011017105, 799821658665135, 2161117825702177665, 5839339565225625385695, 15777893344121814089970225, 42631861976477576445474162255, 115191275282549067433857096442785, 311246783181585603728705429114242815

Offset

-1,1

Comments

Trisection of A028230.

Links

Akshay Bansal, Table of n, a(n) for n = -1..190

Tanya Khovanova, Recursive Sequences

Index entries for linear recurrences with constant coefficients, signature (2702, -1).

Formula

G.f.: 15*(2703*x-1)/(x*(x^2-2702*x+1)). - Philippe Deléham, Nov 19 2008

Mathematica

LinearRecurrence[{2702, -1}, {-15, 15}, 13] (* or *)
CoefficientList[Series[(15 + 15 x)/(1 - 2702 x + x^2), {x, 0, 13}], x] (* Michael De Vlieger, Jul 12 2017 *)

Prog

(PARI) concat(-15, Vec((15 + 15*x)/(1-2702*x+x^2) + O(x^20))) \\ Michel Marcus, Jul 09 2017

Crossrefs

Cf. A028230.

Sequence in context: A134912 A165836 A183827 * A247388 A291575 A004504

Adjacent sequences: A094833 A094834 A094835 * A094837 A094838 A094839

Keyword

sign,easy

Author

Lekraj Beedassy, Jun 03 2004

Extensions

Edited and extended by Ray Chandler, Jun 12 2004

Status

approved