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 A091062 #17 May 02 2022 09:31:45
%S A091062 1,1,9,649,2283123,173636442196,234378355489344704,
%T A091062 5830719097591168695360621,2779203181367458204944451774688032,
%U A091062 26174539685600184383643311230836752183522328,4992259182572292655057303928366260085844535079288641049
%N A091062 Number of n X n matrices over symbol set {1,2,3,4,5} equivalent under any permutation of row, columns or the symbol set.
%H A091062 C. G. Bower, <a href="/A091057/a091057.html">Explanation of A091057-A091062</a>
%H A091062 <a href="/index/Mat#inequiv">Index to number of inequivalent matrices modulo permutation of row and columns</a>
%F A091062 a(n) = sum_{1*s_1+2*s_2+...=n, 1*t_1+2*t_2+...=n, 1*u_1+2*u_2+...=5} (fixA[s_1, s_2, ...;t_1, t_2, ...;u_1, u_2, ...]/(1^s_1*s_1!*2^s_2*s_2!* ... *1^t_1*t_1!*2^t_2*t_2!* ... *1^u_1*u_1!*2^u_2*u_2!*...)) where fixA[...] = prod_{i, j>=1} ( (sum_{d|lcm(i, j)} (d*u_d))^(gcd(i, j)*s_i*t_j)).
%Y A091062 Cf. A091057-A091061.
%Y A091062 Column k=5 of A242095.
%K A091062 nonn
%O A091062 0,3
%A A091062 _Christian G. Bower_, Dec 17 2003
%E A091062 a(10) from _Alois P. Heinz_, Aug 14 2014