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A352562
a(n) = number of modules with n elements over the ring of integers in the imaginary quadratic field of discriminant -4.
0
1, 1, 0, 2, 2, 0, 0, 3, 1, 2, 0, 0, 2, 0, 0, 5, 2, 1, 0, 4, 0, 0, 0, 0, 5, 2, 0, 0, 2, 0, 0, 7, 0, 2, 0, 2, 2, 0, 0, 6, 2, 0, 0, 0, 2, 0, 0, 0, 1, 5, 0, 4, 2, 0, 0, 0, 0, 2, 0, 0, 2, 0, 0, 11, 4, 0, 0, 4, 0, 0, 0, 3, 2, 2, 0, 0, 0, 0, 0, 10, 2, 2, 0, 0, 4, 0, 0, 0, 2, 2, 0, 0, 0, 0, 0, 0, 2, 1, 0, 10, 2, 0, 0, 6, 0, 2, 0, 0, 2, 0, 0, 0, 2, 0, 0, 4, 2
OFFSET
1,4
COMMENTS
See A352550 for comments and PARI code.
CROSSREFS
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Mar 21 2022
STATUS
approved