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 A140713 #6 Nov 28 2018 12:19:35
%S A140713 1,5,1,26,9,2,154,70,26,6,1044,562,268,102,24,8028,4860,2700,1308,504,
%T A140713 120,69264,45756,28224,15828,7728,3000,720
%N A140713 Triangle read by rows: T(n,k) is the number of white corners of rank k in all the permutations of {1,2,...,n} (n>=2, 0<=k<=n-2; for definitions see the Eriksson-Linusson references).
%C A140713 Sum of row n is A140712(n).
%C A140713 T(n,0) = A001705(n-1).
%C A140713 T(n,n-2) = (n-2)!.
%D A140713 K. Eriksson and S. Linusson. Combinatorics of Fulton's essential set. Duke Mathematical Journal 85(1):61-76, 1996.
%H A140713 K. Eriksson and S. Linusson, <a href="http://www.combinatorics.org/ojs/index.php/eljc/article/view/v2i1r6">The size of Fulton's essential set</a>, Electronic J. Combinatorics, Vol. 2, #R6, 1995.
%H A140713 K. Eriksson and S. Linusson, <a href="https://www.researchgate.net/publication/2550835_Combinatorics_of_Fulton's_essential_set">Combinatorics of Fulton's essential set</a>, ResearchGate, 1998.
%e A140713 Triangle starts:
%e A140713 1;
%e A140713 5,1;
%e A140713 26,9,2;
%e A140713 154,70,26,6;
%e A140713 1044,562,268,102,24;
%Y A140713 Cf. A001705, A140711, A140712.
%K A140713 nonn,tabl,more
%O A140713 2,2
%A A140713 _Emeric Deutsch_, May 29 2008