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 A176700 #7 Jun 17 2015 04:13:08 %S A176700 1,1,1,1,3,1,1,5,5,1,1,14,16,14,1,1,44,55,55,44,1,1,146,187,196,187, %T A176700 146,1,1,504,647,686,686,647,504,1,1,1786,2287,2428,2458,2428,2287, %U A176700 1786,1,1,6449,8232,8731,8863,8863,8731,8232,6449,1,1,23635,30081,31862,32352 %N A176700 Triangle T(n,m) = 2+A176697(n)-A176697(m)-A176697(n-m) read along rows 0<=m<=n. %C A176700 Row sums are 1, 2, 5, 12, 46, 200, 864, 3676, 15462, 64552, 268316,... %F A176700 T(n,k) = T(n,n-k). %e A176700 1; %e A176700 1, 1; %e A176700 1, 3, 1; %e A176700 1, 5, 5, 1; %e A176700 1, 14, 16, 14, 1; %e A176700 1, 44, 55, 55, 44, 1; %e A176700 1, 146, 187, 196, 187, 146, 1; %e A176700 1, 504, 647, 686, 686, 647, 504, 1; %e A176700 1, 1786, 2287, 2428, 2458, 2428, 2287, 1786, 1; %e A176700 1, 6449, 8232, 8731, 8863, 8863, 8731, 8232, 6449, 1; %e A176700 1, 23635, 30081, 31862, 32352, 32454, 32352, 31862, 30081, 23635, 1; %p A176700 A176700 :=proc(n,k) %p A176700 2+A176697(n)-A176697(k)-A176697(n-k) ; %p A176700 end proc: # _R. J. Mathar_, Jun 17 2015 %t A176700 a[0] := 1; a[1] := 1;a[2]=3 %t A176700 a[n_] := a[n] = Table[a[i], {i, 0, n - 1}].Table[a[n - 1 - i], {i, 0, n - 1}]; %t A176700 t[n_, m_] := 2 + (-a[m] - a[n - m] + a[n]); %t A176700 Table[Table[t[n, m], {m, 0, n}], {n, 0, 10}] %Y A176700 Cf. A176697. %K A176700 nonn,tabl,easy %O A176700 0,5 %A A176700 _Roger L. Bagula_, Apr 24 2010