A352563 a(n) = number of modules with n elements over the ring of integers in the imaginary quadratic field of discriminant -7.

1, 2, 0, 5, 0, 0, 1, 10, 1, 0, 2, 0, 0, 2, 0, 20, 0, 2, 0, 0, 0, 4, 2, 0, 1, 0, 0, 5, 2, 0, 0, 36, 0, 0, 0, 5, 2, 0, 0, 0, 0, 0, 2, 10, 0, 4, 0, 0, 2, 2, 0, 0, 2, 0, 0, 10, 0, 4, 0, 0, 0, 0, 1, 65, 0, 0, 2, 0, 0, 0, 2, 10, 0, 4, 0, 0, 2, 0, 2, 0, 2, 0, 0, 0, 0, 4, 0, 20, 0, 0, 0, 10, 0, 0, 0, 0, 0, 4, 2, 5, 0, 0, 0, 0, 0, 4, 2, 0, 2, 0, 0, 20, 2, 0, 0, 10

Offset

1,2

Comments

See A352550 for comments and PARI code.

Links

Table of n, a(n) for n=1..116.

Crossrefs

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

Sequence in context: A069025 A356815 A352554 * A145962 A066442 A171388

Adjacent sequences: A352560 A352561 A352562 * A352564 A352565 A352566

Keyword

nonn

Author

N. J. A. Sloane, Mar 21 2022

Status

approved