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 A166065 #7 Aug 11 2015 06:24:23
%S A166065 1,0,2,0,2,2,0,4,2,2,0,8,4,2,2,0,16,8,4,2,2,0,32,16,8,4,2,2,0,64,32,
%T A166065 16,8,4,2,2,0,128,64,32,16,8,4,2,2,0,256,128,64,32,16,8,4,2,2,0,512,
%U A166065 256,128,64,32,16,8,4,2,2,0,1024,512,256,128,64,32,16,8,4,2,2,0,2048,1024
%N A166065 Triangle, read by rows, given by [0,1,1,0,0,0,0,0,0,0,...] DELTA [2,-1,0,0,0,0,0,0,0,...] where DELTA is the operator defined in A084938.
%F A166065 Sum_{k, 0<=k<=n} T(n,k)*x^k = (-1)^n*A084247(n), A000007(n), A000079(n), A001787(n+1), A166060(n), A165665(n), A083585(n) for x= -1, 0, 1, 2, 3, 4, 5 respectively. Sum_{k, 0<=k<=n} T(n,k)*x^(n-k) = A040000(n), A000079(n), A095121(n), A047851(n), A047853(n), A047855(n) for x = 0, 1, 2, 3, 4, 5 respectively.
%F A166065 G.f.: (1-2*x+x*y)/((-1+2*x)*(x*y-1)). - _R. J. Mathar_, Aug 11 2015
%e A166065 Triangle begins :
%e A166065 1,
%e A166065 0,2,
%e A166065 0,2,2,
%e A166065 0,4,2,2,
%e A166065 0,8,4,2,2,
%e A166065 0,16,8,4,2,2,
%e A166065 0,32,16,8,4,2,2,
%e A166065 0,64,32,16,8,4,2,2,
%e A166065 0,128,64,32,16,8,4,2,2,
%e A166065 0,256,128,64,32,16,8,4,2,2,
%e A166065 0,512,256,128,64,32,16,8,4,2,2,
%K A166065 nonn,tabl,easy
%O A166065 0,3
%A A166065 _Philippe Deléham_, Oct 05 2009