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 A291895 #17 Sep 06 2017 03:39:17 %S A291895 1,0,1,0,1,0,1,1,0,2,1,0,3,2,0,5,3,1,0,8,5,1,0,13,9,2,0,22,14,4,0,36, %T A291895 24,6,1,0,60,40,11,1,0,100,66,18,2,0,166,111,31,4,0,277,184,52,7,0, %U A291895 461,308,86,12,1,0,769,513,146,20,1,0,1282,855,243,35,2 %N A291895 Triangle read by rows: T(n,k) = T(n-k,k-1) + T(n-k,k) + T(n-k,k+1) with T(0,0) = 1. %H A291895 Seiichi Manyama, <a href="/A291895/b291895.txt">Rows n = 0..481, flattened</a> %e A291895 First few rows are: %e A291895 1; %e A291895 0, 1; %e A291895 0, 1; %e A291895 0, 1, 1; %e A291895 0, 2, 1; %e A291895 0, 3, 2; %e A291895 0, 5, 3, 1; %e A291895 0, 8, 5, 1; %e A291895 0, 13, 9, 2; %e A291895 0, 22, 14, 4; %e A291895 0, 36, 24, 6, 1. %Y A291895 Row sums give A291896. %Y A291895 Columns 0-1 give A000007, A186085 (for n>0). %K A291895 nonn,tabf %O A291895 0,10 %A A291895 _Seiichi Manyama_, Sep 05 2017