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A028973 Theta series of quadratic form with Gram matrix [ 7, 1, -3; 1, 3, 1; -3, 1, 7 ]. 0
1, 0, 0, 2, 0, 0, 0, 6, 6, 0, 0, 0, 8, 0, 0, 6, 0, 0, 0, 0, 6, 0, 0, 18, 0, 0, 0, 8, 12, 0, 0, 0, 18, 0, 0, 6, 0, 0, 0, 0, 6, 0, 0, 6, 0, 0, 0, 30, 20, 0, 0, 0, 12, 0, 0, 12, 0, 0, 0, 0, 12, 0, 0, 30, 0, 0, 0, 6, 24, 0, 0, 0, 18, 0, 0, 2, 0, 0, 0, 0, 18, 0, 0, 18, 0, 0, 0, 36, 12, 0, 0, 0 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,4

LINKS

Table of n, a(n) for n=0..91.

CROSSREFS

Sequence in context: A336563 A048146 A334045 * A066503 A057385 A231108

Adjacent sequences:  A028970 A028971 A028972 * A028974 A028975 A028976

KEYWORD

nonn

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified August 5 17:20 EDT 2021. Contains 346488 sequences. (Running on oeis4.)