%I #5 May 26 2017 16:42:16
%S 1,1,1,1,0,1,1,1,1,1,0,0,1,0,1,0,0,1,1,1,1,0,0,0,0,1,0,1,0,0,0,0,1,1,
%T 1,1,0,0,0,0,0,0,1,0,1,0,0,0,0,0,0,1,1,1,1,0,0,0,0,0,0,0,0,1,0,1,0,0,
%U 0,0,0,0,0,0,1,1,1,1,0,0,0,0,0,0,0,0,0,0,1,0,1,0,0,0,0,0,0,0,0,0,0,1,1,1,1
%N Absolute value of inverse of number triangle A106465.
%C A 'mixed' sequence array : rows alternate between the rows of the sequence array for the sequence (1,0,1,0,0,0...) and the sequence array for the sequence (1,1,1,1,0,0,0,...). Column 2k has g.f. x^2k(1+x+x^2+x^3); column 2k+1 has g.f. x^(2k+1)(1+x^2). Row sums are A106469. A106468=mod(A106465^(-1),2).
%e Triangle begins
%e 1;
%e 1,1;
%e 1,0,1;
%e 1,1,1,1;
%e 0,0,1,0,1;
%e 0,0,1,1,1,1;
%e 0,0,0,0,1,0,1;
%K nonn,tabl
%O 0,1
%A _Paul Barry_, May 03 2005
|