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 A096339 #10 Dec 27 2018 13:48:11 %S A096339 59,67,83,211,2027,2539,4261,4813,6277,7283,8387,15373,16349,30707, %T A096339 38237,41411,41813,57557,59771,71941,78341,79867,84229,89317,96179, %U A096339 100907,122011,133387,153877,168293,187091,203989,213949,215843,236981 %N A096339 Primes p such that the p-1 digits of the binary expansion of k/p (for k=1,2,3,...,p-1) fit into the k-th row of a magic square grid of order p-1. %D A096339 W. S. Andrews, Magic Squares and Cubes, pp. 176 Dover NY 1960. %D A096339 J. Heleen, Journal of Recreational Mathematics, 30(1) 1999-2000 pp. 72-3 Soln. to Prob. 2394. Magic Reciprocals %D A096339 M. J. Zerger, Journal of Recreational Mathematics, 30(2) 1999-2000 pp. 158-160 Soln. to Prob. 2420. Only 19? %H A096339 H. Heinz, <a href="http://www.magic-squares.net/magic_squares_index.htm">Order-18 based on 1/19</a> %H A096339 Simon Whitechapel, <a href="https://web.archive.org/web/20080518020634/http://www.gwywyr.com/articles/scimaths/pseudo.html">Reciprocal Arrangements</a> [Internet Archive Wayback Machine] %Y A096339 Cf. A072359, A096660. %K A096339 nonn,base %O A096339 1,1 %A A096339 Simon Whitechapel (aladgyma(AT)yahoo.com), Jun 27 2004 %E A096339 Corrected and extended by _William Rex Marshall_, Aug 18 2005