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A034599 Theta series of (putative) extremal 2-modular even lattice in dimension 20. 1
1, 0, 3960, 168960, 2094840, 16625664, 80652000, 343664640, 1073639160, 3299450880, 8000389584, 20081064960, 41278084320, 90307768320, 165298921920, 327406565376, 549720551160, 1009911767040, 1587054299160 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

COMMENTS

This is almost certainly the same sequence as A007038 (this would follow if the lattice R_20 is 2-modular). - N. J. A. Sloane, Sep 23 2019

LINKS

Table of n, a(n) for n=0..18.

H.-G. Quebbemann, Modular lattices in Euclidean spaces, J. Number Theory, 54 (1995), 190-202.

CROSSREFS

Cf. A007038. [R. J. Mathar, Oct 20 2008]

Sequence in context: A250531 A319800 A007038 * A222783 A107540 A210787

Adjacent sequences:  A034596 A034597 A034598 * A034600 A034601 A034602

KEYWORD

nonn

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified August 17 05:07 EDT 2022. Contains 356184 sequences. (Running on oeis4.)