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A106468 Absolute value of inverse of number triangle A106465. 3
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, 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, 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 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

0,1

COMMENTS

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).

LINKS

Table of n, a(n) for n=0..104.

EXAMPLE

Triangle begins

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;

CROSSREFS

Sequence in context: A156174 A187967 A106467 * A030317 A077009 A078556

Adjacent sequences:  A106465 A106466 A106467 * A106469 A106470 A106471

KEYWORD

nonn,tabl

AUTHOR

Paul Barry, May 03 2005

STATUS

approved

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Last modified May 25 03:14 EDT 2019. Contains 323539 sequences. (Running on oeis4.)