Odlyzko, A. M.; Sloane, N. J. A. On exceptions of integral quadratic forms. (English) Zbl 0439.10015 J. Reine Angew. Math. 321, 212-216 (1981). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 3 ReviewsCited in 3 Documents MSC: 11E16 General binary quadratic forms Keywords:even unimodular positive definite quadratic form; exceptions; theta series; representation PDFBibTeX XMLCite \textit{A. M. Odlyzko} and \textit{N. J. A. Sloane}, J. Reine Angew. Math. 321, 212--216 (1981; Zbl 0439.10015) Full Text: DOI Crelle EuDML Online Encyclopedia of Integer Sequences: a(n) is the least integer such that every even unimodular lattice in dimension 8n contains some vectors of all even (squared) norm >= 2*a(n).