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A106468
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Absolute value of inverse of number triangle A106465.
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2
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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; internal format)
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OFFSET
| 0,1
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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. A1064648=mod(A106465^(-1),2).
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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;
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CROSSREFS
| Sequence in context: A132342 A156174 A106467 * A030317 A077009 A078556
Adjacent sequences: A106465 A106466 A106467 * A106469 A106470 A106471
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KEYWORD
| nonn,tabl
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AUTHOR
| Paul Barry (pbarry(AT)wit.ie), May 03 2005
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