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Search: id:A133081
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| 1, 1, 0, 0, 1, 1, 0, 0, 1, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1
(list; table; graph; listen)
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OFFSET
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1,1
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COMMENT
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Row sums = A040001: (1, 1, 2, 1, 2, 1, 2, 1,...). A133081 * [1,2,3,...] = A133090: (1, 1, 5, 3, 9, 5, 13, 7, 17,...). A133080: diagonal and subdiagonal are switched.
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FORMULA
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Infinite lower triangular matrix, (1,0,1,0,...) in the main diagonal and (1,1,1,...) in the subdiagonal.
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EXAMPLE
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First few rows of the triangle are:
1;
1, 0;
0, 1, 1;
0, 0, 1, 0;
0, 0, 0, 1, 1;
...
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CROSSREFS
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Cf. A133080, A133090.
Sequence in context: A156277 A157686 A151666 this_sequence A125999 A073784 A128130
Adjacent sequences: A133078 A133079 A133080 this_sequence A133082 A133083 A133084
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KEYWORD
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nonn,tabl
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AUTHOR
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Gary W. Adamson (qntmpkt(AT)yahoo.com), Sep 09 2007
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