OFFSET
0,3
LINKS
Colin Barker, Table of n, a(n) for n = 0..1000
Benjamin Hackl, C. Heuberger, H. Prodinger, Reductions of Binary Trees and Lattice Paths induced by the Register Function, arXiv preprint arXiv:1612.07286 [math.CO], 2016. (See L_2(z).)
Index entries for linear recurrences with constant coefficients, signature (12,-56,128,-148,80,-16).
FORMULA
a(n) = 12*a(n-1) - 56*a(n-2) + 128*a(n-3) - 148*a(n-4) + 80*a(n-5) - 16*a(n-6) for n>5. - Colin Barker, Nov 23 2017
PROG
(PARI) concat(0, Vec(x*(1 - 8*x + 24*x^2 - 32*x^3 + 20*x^4 + 16*x^6) / ((1 - 2*x)^2*(1 - 4*x + 2*x^2)^2) + O(x^40))) \\ Colin Barker, Nov 23 2017
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
N. J. A. Sloane, Nov 22 2017
STATUS
approved