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 A168511 #13 May 06 2024 12:05:54
%S A168511 1,0,1,0,0,2,0,0,1,4,0,0,2,4,8,0,0,4,10,12,16,0,0,8,24,36,32,32,0,0,
%T A168511 16,56,101,112,80,64,0,0,32,128,270,360,320,192,128,0,0,64,288,696,
%U A168511 1086,1160,864,448,256,0,0,128,640,1744,3120,3900,3488,2240,1024,512
%N A168511 Triangle T(n,k), read by rows, given by [0,0,1,1,0,0,1,1,0,0,1,1,0,0,1,1,...] DELTA [1,1,0,0,1,1,0,0,1,1,0,0,1,1,0,0,...] where DELTA is the operator defined in A084938.
%H A168511 Alois P. Heinz, <a href="/A168511/b168511.txt">Rows n = 0..140, flattened</a>
%F A168511 Sum_{k=0..n} T(n,k)*x^(n-k) = A001405(n), A011782(n), A000108(n), A168490(n), A168492(n) for x = -1,0,1,2,3 respectively.
%e A168511 Triangle begins:
%e A168511 1;
%e A168511 0, 1;
%e A168511 0, 0, 2;
%e A168511 0, 0, 1, 4;
%e A168511 0, 0, 2, 4, 8;
%e A168511 0, 0, 4, 10, 12, 16;
%e A168511 0, 0, 8, 24, 36, 32, 32;
%e A168511 0, 0, 16, 56, 101, 112, 80, 64;
%e A168511 ...
%Y A168511 Cf. A021913, A133872.
%K A168511 nonn,tabl
%O A168511 0,6
%A A168511 _Philippe Deléham_, Nov 28 2009
%E A168511 Corrected and extended by _Philippe Deléham_, Mar 20 2013