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A106468 Absolute value of inverse of number triangle A106465. 3

%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

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Last modified April 19 08:45 EDT 2024. Contains 371782 sequences. (Running on oeis4.)