OFFSET
0,2
LINKS
Colin Barker, Table of n, a(n) for n = 0..1000
Index entries for linear recurrences with constant coefficients, signature (6,-15,20,-15,6,-1).
FORMULA
From Colin Barker, Apr 06 2017: (Start)
G.f.: 2*x*(4 + 11*x + 30*x^2 + 11*x^3 + 4*x^4) / (1 - x)^6.
a(n) = n*(3 + 4*n^2 + n^4).
a(n) = 6*a(n-1) - 15*a(n-2) + 20*a(n-3) - 15*a(n-4) + 6*a(n-5) - a(n-6) for n>5.
(End)
MAPLE
with(combinat, fibonacci):seq(fibonacci(6, i), i=0..35);
MATHEMATICA
LinearRecurrence[{6, -15, 20, -15, 6, -1}, {0, 8, 70, 360, 1292, 3640}, 40] (* Harvey P. Dale, Apr 18 2019 *)
PROG
(Sage) [lucas_number1(6, n, -1) for n in range(0, 30)] # Zerinvary Lajos, May 16 2009
(PARI) concat(0, Vec(2*x*(4 + 11*x + 30*x^2 + 11*x^3 + 4*x^4) / (1 - x)^6 + O(x^30))) \\ Colin Barker, Apr 06 2017
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Zerinvary Lajos, Dec 01 2006
STATUS
approved