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Search: id:A106468
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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; listen)
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OFFSET
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0,1
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COMMENT
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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
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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
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Sequence in context: A099443 A132342 A106467 this_sequence A030317 A077009 A078556
Adjacent sequences: A106465 A106466 A106467 this_sequence A106469 A106470 A106471
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KEYWORD
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nonn,tabl
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AUTHOR
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Paul Barry (pbarry(AT)wit.ie), May 03 2005
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