A139742 a(n) = 11^n - 4^n.

0, 7, 105, 1267, 14385, 160027, 1767465, 19470787, 214293345, 2357685547, 25936376025, 285307476307, 3138411599505, 34522645035067, 379749565147785, 4177247095673827, 45949725568604865, 505447011319424587, 5559917244772754745, 61159090173536639347

Offset

0,2

Links

Vincenzo Librandi, Table of n, a(n) for n = 0..300

Index entries for linear recurrences with constant coefficients, signature (15,-44).

Formula

a(n) = 15*a(n-1) - 44*a(n-2). - Vincenzo Librandi, Jun 02 2011

Mathematica

Table[11^n-4^n, {n, 0, 30}] (* or *) LinearRecurrence[{15, -44}, {0, 7}, 30] (* Harvey P. Dale, Dec 10 2013 *)

Prog

(Magma) [11^n-4^n: n in [0..30]]; // Vincenzo Librandi, Jun 02 2011

Crossrefs

Cf. A000302, A001020.

Sequence in context: A272070 A098362 A093741 * A120049 A067420 A368351

Adjacent sequences: A139739 A139740 A139741 * A139743 A139744 A139745

Keyword

nonn,easy

Author

N. J. A. Sloane, May 20 2008

Status

approved