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A005141 Number of genera of forms with |determinant| = n.
(Formerly M0333)
0
2, 2, 4, 9, 4, 4, 4, 10, 8, 4, 4 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

REFERENCES

J. H. Conway and N. J. A. Sloane, "Sphere Packings, Lattices and Groups", Springer-Verlag, p. 387.

N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

LINKS

Table of n, a(n) for n=1..11.

CROSSREFS

Sequence in context: A124439 A082836 A201376 * A220369 A220313 A021982

Adjacent sequences:  A005138 A005139 A005140 * A005142 A005143 A005144

KEYWORD

nonn,nice,more

AUTHOR

N. J. A. Sloane

STATUS

approved

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Last modified November 30 21:20 EST 2021. Contains 349426 sequences. (Running on oeis4.)