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A139742
a(n) = 11^n - 4^n.
2
0, 7, 105, 1267, 14385, 160027, 1767465, 19470787, 214293345, 2357685547, 25936376025, 285307476307, 3138411599505, 34522645035067, 379749565147785, 4177247095673827, 45949725568604865, 505447011319424587, 5559917244772754745, 61159090173536639347
OFFSET
0,2
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
Sequence in context: A272070 A098362 A093741 * A120049 A067420 A368351
KEYWORD
nonn,easy
AUTHOR
N. J. A. Sloane, May 20 2008
STATUS
approved