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 A133371 #8 Nov 21 2013 12:49:06
%S A133371 1,13,1,169,26,1,2197,507,39,1,28561,8788,1014,52,1,371293,142805,
%T A133371 21970,1690,65,1,4826809,2227758,428415,43940,2535,78,1,62748517,
%U A133371 33787663,7797153,999635,76895,3549,91,1
%N A133371 Triangle read by rows: T(i,j) is the number of i-permutations of 14 objects a,b,c,d,e,f,g,h,i,j,k,l,m,n, with repetition allowed, containing j a's.
%C A133371 Mirror image of A123187. - _Philippe Deléham_, Dec 27 2007
%e A133371 1
%e A133371 13, 1
%e A133371 169, 26, 1
%e A133371 2197, 507, 39, 1
%e A133371 28561, 8788, 1014, 52, 1
%e A133371 371293, 142805, 21970, 1690, 65, 1
%e A133371 4826809, 2227758, 428415, 43940, 2535, 78, 1
%e A133371 62748517, 33787663, 7797153, 999635, 76895, 3549, 91, 1
%p A133371 for i from 0 to 7 do seq(binomial(i, j)*13^(i-j), j = 0 .. i) od;
%t A133371 Flatten[Table[Binomial[i,j] 13^(i-j),{i,0,7},{j,0,i}]] (* _Harvey P. Dale_, Nov 01 2011 *)
%Y A133371 Cf. A001022, A008595.
%K A133371 easy,nonn,tabl
%O A133371 0,2
%A A133371 _Zerinvary Lajos_, with help from Emeric Deutsch, Dec 21 2007