STATUS
editing
approved
The OEIS is supported by the many generous donors to the OEIS Foundation.
editing
approved
a(n) = (1/86)*sqrt(43)*((6+sqrt(43))^n - (6-sqrt(43))^n). - Paolo P. Lava, Jan 13 2009
approved
editing
(MAGMAMagma) [n le 2 select n-1 else 12*Self(n-1) + 7*Self(n-2): n in [1..30]]; // Vincenzo Librandi, Nov 22 2012
(Sage) [lucas_number1(n, 12, -7) for n in xrangerange(0, 18)] # Zerinvary Lajos, Apr 29 2009
proposed
approved
editing
proposed
Join[{a=0, b=1}, Table[c=12*b+7*a; a=b; b=c, {n, 60}]] (* Vladimir Joseph Stephan Orlovsky, Jan 31 2011 *)
(Sage) [lucas_number1(n, 12, -7) for n in xrange(0, 18)] # [From __Zerinvary Lajos_, Apr 29 2009]
proposed
editing
editing
proposed
a(n) = 12 *a(n-1) + 7 *a(n-2).
<a href="/index/Rec#order_02">Index entries for linear recurrences with constant coefficients</a>, signature (12,7).
a(n) = (1/86)*sqrt(43)*((6+sqrt(43))^n - (6-sqrt(43))^n). [_- _Paolo P. Lava_, Jan 13 2009]
(PARI) x='x+O('x^30); concat([0], Vec(x/(1-12*x-7*x^2))) \\ G. C. Greubel, Dec 30 2017
approved
editing
<a href="/index/Rec">Index to sequences with entries for linear recurrences with constant coefficients</a>, signature (12,7).