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A352557
a(n) = number of modules with n elements over the ring of integers in the real quadratic field of discriminant 28.
0
1, 1, 2, 2, 0, 2, 1, 3, 5, 0, 0, 4, 0, 1, 0, 5, 0, 5, 2, 0, 2, 0, 0, 6, 1, 0, 10, 2, 2, 0, 2, 7, 0, 0, 0, 10, 2, 2, 0, 0, 0, 2, 0, 0, 0, 0, 2, 10, 2, 1, 0, 0, 2, 10, 0, 3, 4, 2, 2, 0, 0, 2, 5, 11, 0, 0, 0, 0, 0, 0, 0, 15, 0, 2, 2, 4, 0, 0, 0, 0, 20, 0, 2, 4, 0, 0, 4, 0, 0, 0, 0, 0, 4, 2, 0, 14, 0, 2, 0, 2, 0, 0, 2, 0, 0, 2, 0, 20, 2, 0, 4, 5, 2, 4
OFFSET
1,3
COMMENTS
See A352550 for comments and PARI code.
CROSSREFS
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Mar 20 2022
STATUS
approved