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A279676 Coefficients in the expansion of 1/([r] + [2r]x + [3r]x^2 + ...); [ ] = floor, r = 5/3. 5
1, -3, 4, -3, -1, 8, -14, 12, 4, -32, 56, -48, -16, 128, -224, 192, 64, -512, 896, -768, -256, 2048, -3584, 3072, 1024, -8192, 14336, -12288, -4096, 32768, -57344, 49152, 16384, -131072, 229376, -196608, -65536, 524288, -917504, 786432, 262144, -2097152 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

If n >=11, then 16 divides a(n).

LINKS

Clark Kimberling, Table of n, a(n) for n = 0..1000

Index entries for linear recurrences with constant coefficients, signature (-2,-2).

FORMULA

G.f.: 1/(1 + 2x + 4x^2 + 5x^3 + 6x^4 + 8x^5 + ...).

G.f.: (1 - x) (1 - x^3)/(1 + 2 x + 2 x^2).

MATHEMATICA

z = 50; f[x_] := f[x] = Sum[Floor[(5/3)*(k + 1)] x^k, {k, 0, z}]; f[x]

CoefficientList[Series[1/f[x], {x, 0, z}], x]

CROSSREFS

Cf. A279634, A279675.

Sequence in context: A136206 A262979 A011190 * A279588 A279590 A201935

Adjacent sequences:  A279673 A279674 A279675 * A279677 A279678 A279679

KEYWORD

sign,easy

AUTHOR

Clark Kimberling, Dec 18 2016

STATUS

approved

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Last modified June 5 12:47 EDT 2020. Contains 334840 sequences. (Running on oeis4.)