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 A182946 #4 Mar 30 2012 18:57:12
%S A182946 3,9,5,27,25,7,81,125,49,11,243,625,343,121,13,729,3125,2401,1331,169,
%T A182946 17,2187,15625,16807,14641,2197,289,19,6561,78125,117649,161051,28561,
%U A182946 4913,361,23,19683,390625,823543,1771561,371293,83521,6859,529,29
%N A182946 Array of odd prime powers p^j, where j>=1, by antidiagonals.
%C A182946 The monotonic ordering of A182946, with 1 prefixed, is A061345. The joint-rank array of A182946 is A182870.
%t A182946 width=9;Transpose[Table[Table[Prime[n+1]^j,{n,1,width},{j,1,width}]]]; Flatten[Table[Table[%[[z-k+1]][[k]],{k,1,z}],{z,1,width}]]
%Y A182946 Cf. A061345, A182445.
%K A182946 nonn,tabl
%O A182946 1,1
%A A182946 _Clark Kimberling_, Dec 14 2010