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 A060705 #12 Jul 02 2025 16:02:01
%S A060705 1,33,8451,18785601,371722135203,65965023738046161,
%T A060705 105230885027939446251843,1510241390481066772867454516481,
%U A060705 195045439041853604357302110432234667203
%N A060705 Singular n X n matrices over GF(3).
%H A060705 Harry J. Smith, <a href="/A060705/b060705.txt">Table of n, a(n) for n = 1..45</a>
%F A060705 For n >= 1, a(n) = 3^(n^2) - A053290(n) = 3^(n^2) - (3^n - 1)*(3^n - 3)*...*(3^n - 3^(n-1)).
%p A060705 for n from 1 to 20 do printf(`%d,`,3^(n^2) - product(3^n - 3^j, j=0..n-1)) od:
%o A060705 (PARI) a(n)={3^(n^2) - prod(j=0, n-1, 3^n - 3^j)} \\ _Harry J. Smith_, Jul 09 2009
%Y A060705 Cf. A053290.
%K A060705 nonn
%O A060705 1,2
%A A060705 Ahmed Fares (ahmedfares(AT)my-deja.com), Apr 20 2001
%E A060705 More terms from _James Sellers_, Apr 23 2001