A139741 a(n) = 11^n - 3^n.

0, 8, 112, 1304, 14560, 160808, 1770832, 19484984, 214352320, 2357928008, 25937365552, 285311493464, 3138427845280, 34522710549608, 379749828800272, 4177248155066744, 45949729820525440, 505447028370153608, 5559917313104810992, 61159090447252284824

Offset

0,2

Links

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

Index entries for linear recurrences with constant coefficients, signature (14,-33).

Formula

a(n) = 14*a(n-1) - 33*a(n-2). [Vincenzo Librandi, Jun 02 2011]

G.f.: 8*x / ((1 - 3*x)*(1 - 11*x)). [Bruno Berselli, Oct 05 2014]

a(n+1) = 8*A016146(n). [Bruno Berselli, Oct 05 2014]

Prog

(Magma) [11^n-3^n: n in [0..30]]; // Vincenzo Librandi, Jun 02 2011

Crossrefs

Cf. A016146, and similar sequences listed in A248225.

Sequence in context: A075851 A270111 A053536 * A067900 A067414 A265665

Adjacent sequences: A139738 A139739 A139740 * A139742 A139743 A139744

Keyword

nonn,easy

Author

N. J. A. Sloane, May 20 2008

Status

approved