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A001361 Number of points in interior of n-th crystal ball in E_8 lattice. +0
1
1, 241, 26641, 338401, 2240161, 10242001, 36638641, 109907521, 288653761, 683158321, 1486914001, 3020862241, 5793372001, 10579330321, 18522042481, 31261968001, 51096647041, 81176500081, 125741512081 (list; graph; listen)
OFFSET

1,2
LINKS

Index entries for crystal ball sequences

J. H. Conway and N. J. A. Sloane, Low-Dimensional Lattices VII: Coordination Sequences, Proc. Royal Soc. London, A453 (1997), 2369-2389 (Abstract, pdf, ps).

G. Nebe and N. J. A. Sloane, Home page for this lattice

MAPLE

57/7*x^8-108/7*x^7+30*x^6-72*x^5+39*x^4-36*x^3+300/7*x^2+24/7*x+1

CROSSREFS

Cf. A008340, A008349.

Sequence in context: A094732 A119728 A133327 this_sequence A120377 A060110 A113468

Adjacent sequences: A001358 A001359 A001360 this_sequence A001362 A001363 A001364

KEYWORD

nonn

AUTHOR

njas

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Last modified September 6 16:04 EDT 2008. Contains 143483 sequences.

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