This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A038541 #26 Mar 21 2022 11:30:36 %S A038541 1,1,2,2,1,2,2,3,5,1,0,4,0,2,2,5,0,5,0,2,4,0,2,6,2,0,10,4,2,2,0,7,0,0, %T A038541 2,10,0,0,0,3,2,4,2,0,5,2,2,10,5,2,0,0,0,10,0,6,0,2,0,4,2,0,10,11,0,0, %U A038541 2,0,4,2,0,15,0,0,4,0,0,0,0,5,20,2,2,8,0,2,4,0,2,5,0,4,0,2,0,14 %N A038541 a(n) = number of modules with n elements over the ring of integers in the imaginary quadratic field of discriminant -20. %C A038541 Equivalently, number of modules with n elements over the ring Z[sqrt(-5)]. %C A038541 See A352550 for comments and PARI code. %Y A038541 Cf. A038540, A038541, A248107, A352550-A352567. %K A038541 nonn,mult %O A038541 1,3 %A A038541 Paolo Dominici (pl.dm(AT)libero.it) %E A038541 Edited by _M. F. Hasler_, Feb 18 2022 %E A038541 Revised by _N. J. A. Sloane_, Mar 21 2022