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 A116192 #6 Sep 08 2013 13:30:51
%S A116192 1,3,3,5,4,5,7,7,7,7,9,8,8,8,9,11,11,10,10,11,11,13,12,13,12,13,12,13,
%T A116192 15,15,15,15,15,15,15,15,17,16,16,16,16,16,16,16,17,19,19,18,18,18,18,
%U A116192 18,18,19,19,21,20,21,20,20,20,20,20,21,20,21,23,23,23,23,22,22,22,22
%N A116192 Triangle T(n,k), 0<=k<=n : T(n,k)is smallest number such that T(n,k)>T(n-1,k-1), T(n,k)>T(n-1,k), T(n,k)and T(n-1,k-1)+T(n-1,k) have the same parity, T(0,0)=1 .
%C A116192 Sequence read mod 2 gives A047999 .
%F A116192 Sum_{k, 0<=k<=n}T(n,k)=A128806(n). T(2n,n)=A008574(n). T(n,k)=2n+1 if binomial(n,k) is odd, T(n,k)=2n if binomial(n,k) is even .
%e A116192 Triangle begins:
%e A116192 1;
%e A116192 3, 3;
%e A116192 5, 4, 5;
%e A116192 7, 7, 7, 7;
%e A116192 9, 8, 8, 8, 9;
%e A116192 11, 11, 10, 10, 11, 11;
%e A116192 13, 12, 13, 12, 13, 12, 13;
%e A116192 15, 15, 15, 15, 15, 15, 15, 15 ;...
%Y A116192 Diagonals : A005408, A014601.
%K A116192 nonn,tabl
%O A116192 0,2
%A A116192 _Philippe Deléham_, Apr 08 2007