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 A053770 #15 May 13 2019 12:23:54 %S A053770 1,1,1,1345,666625,223985665,65019838465,105072058957825, %T A053770 11436238073940148225,997931868985434228916225, %U A053770 74706800043914446529756135425,5321514758546715999509008953114625,3721818216683598164434468712927276826625 %N A053770 Number of n X n binary matrices of order dividing 5 (i.e., number of solutions of X^5=I in GL(n,2)). %D A053770 V. Jovovic, The cycle index polynomials of some classical groups, Belgrade, 1995, unpublished. %H A053770 Kent E. Morrison, <a href="https://cs.uwaterloo.ca/journals/JIS/VOL9/Morrison/morrison37.html">Integer Sequences and Matrices Over Finite Fields</a>, Journal of Integer Sequences, Vol. 9 (2006), Article 06.2.1. %o A053770 (PARI) \\ See A053725 for F(n,q,k). %o A053770 F(15, 2, 5) \\ _Andrew Howroyd_, Jul 09 2018 %Y A053770 Cf. A053722, A053725, A053718. %K A053770 nonn %O A053770 1,4 %A A053770 _Vladeta Jovovic_, Mar 24 2000 %E A053770 a(13) from _Andrew Howroyd_, Jul 09 2018