Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).
%I #9 Jan 22 2020 15:08:52
%S 1,1,1,0,2,2,0,0,4,4,0,0,0,8,8,0,0,0,0,16,16,0,0,0,0,0,32,32,0,0,0,0,
%T 0,0,64,64
%N A134309 * A097806.
%C A134315 * [1,2,3,...] = A128135: (1, 3, 10 28, 72, 176, 416, ...).
%C Triangle read by rows given by [1,-1,0,0,0,0,0,0,...] DELTA [1,1,0,0,0,0,0,0,0,...] where DELTA is the operator defined in A084938. - _Philippe Deléham_, Oct 20 2007
%F A134309 * A134315 as infinite lower triangular matrices. Triangle read by rows, for n>1, (n-1) zeros followed by 2^(n-1), 2^(n-1). As an infinite lower triangular matrix, (1, 1, 2, 4, 8, ...) in the main diagonal and (1, 2, 4, 8, ...) in the subdiagonal.
%F G.f.: (-1-x+x*y)/(-1+2*x*y). - _R. J. Mathar_, Aug 11 2015
%e First few rows of the triangle are:
%e 1;
%e 1, 1;
%e 0, 2, 2;
%e 0, 0, 4, 4;
%e 0, 0, 0, 8, 8;
%e ...
%Y Cf. A134309, A097806, A128135.
%K nonn,tabl,easy
%O 1,5
%A _Gary W. Adamson_, Oct 19 2007