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A158948
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Triangle read by rows, left border = natural numbers repeated (1, 1, 2, 2, 3, 3, ...); all other columns = (1, 0, 1, 0, 1, 0, ...).
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2
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1, 1, 1, 2, 0, 1, 2, 1, 0, 1, 3, 0, 1, 0, 1, 3, 1, 0, 1, 0, 1, 4, 0, 1, 0, 1, 0, 1, 4, 1, 0, 1, 0, 1, 0, 1, 5, 0, 1, 0, 1, 0, 1, 0, 1, 5, 1, 0, 1, 0, 1, 0, 1, 0, 1
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listen;
history;
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internal format)
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OFFSET
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1,4
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COMMENTS
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Row sums = n. Eigensequence of the triangle = nonzero terms of A000071: (1, 2, 4, 7, 12, 20, ...) = ((F3 - 1), (F4 - 1), (F5 - 1), ...).
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LINKS
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FORMULA
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Triangle by rows, left border = natural numbers repeated (1, 1, 2, 2, 3, 3, ...); all other columns = (1, 0, 1, 0, 1, 0, ...).
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EXAMPLE
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First few rows of the triangle:
1;
1, 1;
2, 0, 1;
2, 1, 0, 1;
3, 0, 1, 0, 1;
3, 1, 0, 1, 0, 1;
4, 0, 1, 0, 1, 0, 1;
4, 1, 0, 1, 0, 1, 0, 1;
5, 0, 1, 0, 1, 0, 1, 0, 1;
5, 1, 0, 1, 0, 1, 0, 1, 0, 1;
6, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1;
6, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1;
7, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1;
...
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CROSSREFS
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KEYWORD
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nonn,tabf
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AUTHOR
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STATUS
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approved
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