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A015601
a(n) = 11*a(n-1) + 7*a(n-2).
1
0, 1, 11, 128, 1485, 17231, 199936, 2319913, 26918595, 312343936, 3624213461, 42052755623, 487949806080, 5661817156241, 65695637361211, 762284731067008, 8845001503265565, 102631009653390271, 1190856116710151936, 13817834351385403193
OFFSET
0,3
FORMULA
G.f.: x/(1-11*x-7*x^2). - Zerinvary Lajos, Apr 27 2009
MATHEMATICA
Join[{a=0, b=1}, Table[c=11*b+7*a; a=b; b=c, {n, 60}]] (* Vladimir Joseph Stephan Orlovsky, Jan 31 2011 *)
LinearRecurrence[{11, 7}, {0, 1}, 30] (* Vincenzo Librandi, Nov 22 2012 *)
PROG
(Sage) [lucas_number1(n, 11, -7) for n in range(0, 18)] # Zerinvary Lajos, Apr 27 2009
(Magma) [n le 1 select n else 11*Self(n)+7*Self(n-1): n in [0..30]]; // Vincenzo Librandi, Nov 22 2012
CROSSREFS
Sequence in context: A181012 A168327 A282042 * A024144 A201877 A015602
KEYWORD
nonn,easy
STATUS
approved