A114563 - OEIS

A114563

Number of "escalator" lattices in dimension n.

1, 1, 2, 9, 207, 1632, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0

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OFFSET

0,3

REFERENCES

Manjul Bhargava, lecture on Universal Forms, AMS Annual Meeting, Phoenix, AZ, Jan 08 2004.

LINKS

Table of n, a(n) for n=0..96.

Manjul Bhargava , On the Conway-Schneeberger fifteen theorem, pp. 27-38, in: Quadratic Forms and Their Applications, 1999.

FORMULA

Zero for n >= 6.

CROSSREFS

Sequence in context: A367901 A069649 A111832 * A217017 A112311 A067564