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 A182871 #5 Mar 30 2012 18:57:12 %S A182871 1,3,2,7,11,4,16,27,20,5,26,36,32,28,6,30,49,47,42,29,8,34,59,61,60, %T A182871 46,31,9,41,70,75,78,64,55,33,10,52,85,89,96,86,71,57,35,12,56,94,103, %U A182871 114,102,92,80,58,37,13,62,106,119,129,121,113,101,84,63,38 %N A182871 Joint-rank array of the numbers p^j, where p is a prime congruent to 3 mod 4 and j>=1, read by antidiagonals. %C A182871 Joint-rank arrays are defined in the first comment at A182801. A182871 is a permutation of the positive integers. %e A182871 Northwest corner: %e A182871 1....3....7...16... %e A182871 2...11...27...36... %e A182871 4...20...32...47... %e A182871 5...28...42...60... %Y A182871 Cf. A182801, A182869, A182870, A182872. %K A182871 nonn,tabl %O A182871 1,2 %A A182871 _Clark Kimberling_, Dec 09 2010