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 A068516 #13 Jul 03 2022 06:45:35 %S A068516 3,16,16,162,48,696,104,1236,486,4680,256,9366,2088,2592,1342,28296, %T A068516 3708,44640,2592,11136,14040,97416,1664,100410,28098,99936,11136, %U A068516 250110,7776,327840,20924,74880,84888,112752,19776,671346,133920,149856,16848 %N A068516 Number of squares (of another matrix) in the group GL(2,Z_n) described in sequence A000252. %C A068516 The sequence is multiplicative. This is the 2-dimensional analog of A046073. %Y A068516 Cf. A000252, A046073, A068197. %K A068516 nonn,mult %O A068516 2,1 %A A068516 Sharon Sela (sharonsela(AT)hotmail.com), Mar 19 2002 %E A068516 Terms a(21) and beyond from _Andrey Zabolotskiy_, Jul 02 2022