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Search: id:A135839
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| A135839 |
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Triangle read by rows: starting with A138174, replace left border with (1, 1, 1,...). |
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+0
3
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| 1, 1, 1, 1, 0, 1, 1, 1, 0, 1, 1, 0, 1, 0, 1, 1, 1, 0, 1, 0, 1, 1, 0, 1, 0, 1, 0, 1, 1, 1, 0, 1, 0, 1, 0, 1, 1, 0, 1, 0, 1, 0, 1, 0, 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 = (1, 2, 2, 3, 3, 4, 4, 5, 5,...).
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FORMULA
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Given A128174, replace left border with (1, 1, 1,...). Triangle read by rows, odd rows = n terms of (1, 0, 1,...); even rows = n terms of (1, 1, 0, 1, 0, 1,...). By columns, leftmost column = (1, 1, 1,...); all others = (1, 0, 1, 0, 1,...).
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EXAMPLE
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First few rows of the triangle are:
1;
1, 1;
1, 0, 1;
1, 1, 0, 1;
1, 0, 1, 0, 1;
1, 1, 0, 1, 0, 1;
1, 0, 1, 0, 1, 0, 1;
...
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CROSSREFS
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Sequence in context: A110471 A103994 A051731 this_sequence A120529 A099443 A132342
Adjacent sequences: A135836 A135837 A135838 this_sequence A135840 A135841 A135842
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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), Dec 01 2007
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