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 A352553 #5 Mar 21 2022 11:09:16 %S A352553 1,0,2,1,0,0,0,0,5,0,0,2,1,0,0,2,2,0,0,0,0,0,2,0,1,0,10,0,2,0,0,0,0,0, %T A352553 0,5,0,0,2,0,0,0,2,0,0,0,0,4,1,0,4,1,2,0,0,0,0,0,0,0,2,0,0,3,0,0,0,2, %U A352553 4,0,0,0,0,0,2,0,0,0,2,0,20,0,0,0,0,0,4,0,0,0,0,2,0,0,0,0,0,0,0,1,2,0,2,0,0,0,2,10,0,0,0,0,2,0,0,2 %N A352553 a(n) = number of modules with n elements over the ring of integers in the real quadratic field of discriminant 13. %C A352553 See A352550 for comments and PARI code. %Y A352553 Cf. A038540, A038541, A248107, A352550-A352567. %K A352553 nonn %O A352553 1,3 %A A352553 _N. J. A. Sloane_, Mar 20 2022