a(n) = number of modules with n elements over the ring of integers in the imaginary quadratic field of discriminant -20.
A038541
a(n) = number of modules with n elements over the ring of integers in the imaginary quadratic field of discriminant -20.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =2a(4) =1a(5) =2a(6) =2a(7) =3a(8) =5a(9) =1a(10) =0a(11) =4a(12) =0a(13) =2a(14) =2a(15) =5a(16) =0a(17) =5a(18) =0a(19) =2a(20) =4a(21) =0a(22) =2a(23) =6a(24) =2a(25) =0a(26) =10a(27) =4a(28) =2a(29) =2
External references
- oeis: A038541