%I #5 Mar 21 2022 11:25:32

%S 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,

%T 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,

%U 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

%N a(n) = number of modules with n elements over the ring of integers in the imaginary quadratic field of discriminant -4.

%C See A352550 for comments and PARI code.

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

%K nonn

%O 1,4

%A _N. J. A. Sloane_, Mar 21 2022