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 A093898 #18 Aug 15 2017 03:14:42
%S A093898 2,3,8,4,17,54,5,32,145,512,6,57,368,1649,6250,7,100,945,5392,23401,
%T A093898 93312,8,177,2530,18785,94932,397585,1647086,9,320,7073,69632,423393,
%U A093898 1941760,7861953,33554432,10,593,20412,268705,2012174,10609137,45136576
%N A093898 Triangle read by rows: T(n,r) = n^r + r^n (1 <= r <= n).
%e A093898 2,
%e A093898 3, 8,
%e A093898 4, 17, 54,
%e A093898 5, 32, 145, 512,
%e A093898 6, 57, 368, 1649, 6250,
%e A093898 7, 100, 945, 5392, 23401, 93312,
%p A093898 T:=(n,r)->n^r+r^n: for n from 1 to 10 do seq(T(n,r),r=1..n) od; # yields sequence in triangular form # _Emeric Deutsch_, Feb 04 2006
%t A093898 Flatten[Table[n^r+r^n,{n,10},{r,n}]] (* _Harvey P. Dale_, Jun 19 2011 *)
%Y A093898 Same information as A055652. - _Franklin T. Adams-Watters_, Oct 26 2009
%K A093898 nonn,tabl
%O A093898 1,1
%A A093898 _Amarnath Murthy_, Apr 23 2004
%E A093898 More terms from _Emeric Deutsch_, Feb 04 2006