A005141 Number of genera of forms with |determinant| = n. (Formerly M0333)

2, 2, 4, 9, 4, 4, 4, 10, 8, 4, 4

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