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A126920 Coordination sequence for 18-dimensional cyclotomic lattice Z[zeta_27]. 0
1, 18, 171, 1149, 6147, 27873, 111243, 400617, 1324737, 4074197, 11768193, 32170743, 83746863, 208651167, 499620447, 1153893249, 2578177134, 5587511355, 11772651036, 24163091856, 48397837608, 94751037108, 181570410972, 341010096552, 628429016457 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..24.

M. Beck and S. Hosten, Cyclotomic polytopes and growth series of cyclotomic lattices, arXiv math.CO/0508136.

FORMULA

G.f.: (x^3+1)^9/(1-x)^18.

CROSSREFS

Sequence in context: A139618 A162638 A010970 * A341228 A022583 A321951

Adjacent sequences:  A126917 A126918 A126919 * A126921 A126922 A126923

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Mar 18 2007

STATUS

approved

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Last modified November 28 22:01 EST 2021. Contains 349415 sequences. (Running on oeis4.)