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 A086190 #8 Jul 08 2018 21:29:33
%S A086190 0,2,128,50258,152583680,3848135499362,831635515536146048,
%T A086190 1565118078583425627499058,25891049952879626239605534955520,
%U A086190 3786985075909223206935197348611801222082,4916838220400668315060476949839366817233722142848
%N A086190 Sum of rank(M) over all n X n matrices over GF(3).
%F A086190 a(n) = Sum_{r=1..n} r*Product_{j=0..r-1} (q^n-q^j)^2/(q^r-q^j) with q=3.
%o A086190 (PARI) a(n)=sum(r=1,n, r*prod(j=0,(r-1),(3^n-3^j)^2/(3^r-3^j)))
%Y A086190 Cf. A086098.
%K A086190 nonn
%O A086190 0,2
%A A086190 Yuval Dekel (dekelyuval(AT)hotmail.com), Aug 26 2003
%E A086190 More terms from _Benoit Cloitre_, Aug 27 2003
%E A086190 a(10) from _Andrew Howroyd_, Jul 08 2018