id:A023916 - OEIS Search Results

Search: id:A023916

Displaying 1-1 of 1 results found.

page 1

Theta series of A*_4 lattice.

+0
1

1, 0, 10, 20, 0, 20, 0, 60, 50, 0, 30, 0, 60, 120, 0, 60, 0, 160, 70, 0, 60, 0, 120, 220, 0, 120, 0, 200, 180, 0, 40, 0, 210, 240, 0, 180, 0, 360, 200, 0, 150, 0, 120, 420, 0, 140, 0, 460, 220, 0, 130, 0, 360, 520, 0, 240, 0, 400, 300, 0, 180, 0, 320, 420, 0, 360, 0, 660, 480, 0, 120 (list; graph; listen)

	OFFSET	`0,3`
	REFERENCES	`J. H. Conway and N. J. A. Sloane, "Sphere Packings, Lattices and Groups", Springer-Verlag, p. 114.`
	LINKS	`John Cannon, Table of n, a(n) for n = 0..5000` `G. Nebe and N. J. A. Sloane, Home page for this lattice`
	EXAMPLE	`1 + 10q^4 + 20q^6 + 20q^10 + 60q^14 + 50q^16 + 30q^20 + 60q^24 + 120q^26 + 60q^30 + 160q^34 + 70q^36 + 60q^40 + 120q^44 + 220q^46 + 120q^50 + 200q^54 + 180q^56 + 40q^60 + O(q^62)`
	PROGRAM	`(MAGMA) L:=Lattice("A", 4); D:=Dual(L); T1<q> := ThetaSeries(D, 60);`
	CROSSREFS	`Sequence in context: A110368 A006050 A045646 this_sequence A107859 A067524 A069555` `Adjacent sequences: A023913 A023914 A023915 this_sequence A023917 A023918 A023919`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com).`
	EXTENSIONS	`More terms from N. J. A. Sloane (njas(AT)research.att.com), Dec 24 2006`

page 1

Search completed in 0.002 seconds

Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

AT&T Labs Research