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A114563 Number of "escalator" lattices in dimension n. 0
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 (list; graph; refs; listen; history; internal format)
OFFSET

0,3

REFERENCES

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

FORMULA

Zero for n >= 6.

CROSSREFS

Sequence in context: A123625 A069649 A111832 * A112311 A067564 A165797

Adjacent sequences:  A114560 A114561 A114562 * A114564 A114565 A114566

KEYWORD

nonn

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com), Feb 16 2006

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Last modified February 16 20:06 EST 2012. Contains 205955 sequences.