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 A294452 Expansion of x*(16*x^6+20*x^4-32*x^3+24*x^2-8*x+1) / ((-1+2*x)^2*(2*x^2-4*x+1)^2). 1
 0, 1, 4, 16, 64, 256, 1024, 4096, 16320, 64512, 252416, 976896, 3740928, 14186496, 53330944, 198946816, 737156096, 2715254784, 9949593600, 36292198400, 131845099520, 477257695232, 1722054197248, 6195670220800, 22233100238848, 79595401641984, 284344067424256, 1013792167690240 (list; graph; refs; listen; history; text; internal format)
 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 Sequence in context: A077821 A215877 A206450 * A270142 A000302 A262710 Adjacent sequences: A294449 A294450 A294451 * A294453 A294454 A294455 KEYWORD nonn,easy AUTHOR N. J. A. Sloane, Nov 22 2017 STATUS approved

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Last modified April 1 06:57 EDT 2023. Contains 361673 sequences. (Running on oeis4.)