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 A246818 #3 Sep 04 2014 02:44:13 %S A246818 1,0,1,4,32,277,3179,41799,632365,10922385,210953381,4498975425, %T A246818 105131807571,2672061475343,73358721633794,2163013965362752, %U A246818 68174082537113173,2287395123402364673,81397403660409278779,3061825168335759481187,121385088042529743488517,5058460899905730365609710 %N A246818 Number of standard Young tableaux with 2n cells where n is the largest value in the last row. %C A246818 Also the number of ballot sequences of length 2n having the last occurrence of the maximal value at position n. %F A246818 a(n) = A238727(2n,n). %Y A246818 Cf. A238727. %K A246818 nonn %O A246818 0,4 %A A246818 _Joerg Arndt_ and _Alois P. Heinz_, Sep 04 2014