A352551 a(n) = number of modules with n elements over the ring of integers in the real quadratic field of discriminant 8.

1, 1, 0, 2, 0, 0, 2, 3, 1, 0, 0, 0, 0, 2, 0, 5, 2, 1, 0, 0, 0, 0, 2, 0, 1, 0, 0, 4, 0, 0, 2, 7, 0, 2, 0, 2, 0, 0, 0, 0, 2, 0, 0, 0, 0, 2, 2, 0, 5, 1, 0, 0, 0, 0, 0, 6, 0, 0, 0, 0, 0, 2, 2, 11, 0, 0, 0, 4, 0, 0, 2, 3, 2, 0, 0, 0, 0, 0, 2, 0, 2, 2, 0, 0, 0, 0, 0, 0, 2, 0, 0, 4, 0, 2, 0, 0

Offset

1,4

Comments

See A352550 for comments and PARI code.

Links

Table of n, a(n) for n=1..96.

Crossrefs

Cf. A038540, A038541, A248107, A352550-A352567.

Sequence in context: A306418 A323886 A340829 * A174739 A280542 A340378

Adjacent sequences: A352548 A352549 A352550 * A352552 A352553 A352554

Keyword

nonn

Author

N. J. A. Sloane, Mar 20 2022

Status

approved