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Search: id:A134838
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| A134838 |
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Triangle read by rows, n-th row = first n terms of an array formed by A051731 * A051731(transform). |
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+0
2
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| 1, 1, 2, 1, 1, 2, 1, 2, 1, 3, 1, 1, 1, 2, 1, 2, 2, 2, 1, 4, 1, 1, 1, 1, 1, 1, 2, 1, 2, 2, 2, 1, 4, 1, 1, 1, 1, 1, 1, 2, 1, 2, 1, 3, 1, 2, 1, 4, 1, 1, 2, 1, 1, 2, 1, 1, 3, 1, 2, 1, 2, 2, 2, 1, 2, 1, 4
(list; table; graph; listen)
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OFFSET
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1,3
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COMMENT
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Row sums = sigma(n), A000203: (1, 3, 4, 7, 6, 12, 8,...). Right border = d(n), A000005: (1, 2, 2, 3, 2, 4, 2, 4,...).
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FORMULA
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Given the transform A051731 * A051731(transform), extract the first n terms of each row to form the triangle.
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EXAMPLE
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First few rows of the array are:
1, 1, 1, 1, 1, 1, 1,...
1, 2, 1, 2, 1, 2, 1,...
1, 1, 2, 1, 1, 2, 1,...
1, 2, 1, 3, 1, 2, 1,...
1, 1, 1, 1, 2, 1, 1,...
1, 2, 2, 2, 1, 4, 1,...
...
First few rows of the triangle are:
1;
1, 2;
1, 1, 2;
1, 2, 1, 3;
1, 1, 1, 1, 2;
1, 2, 2, 2, 1, 4;
1, 1, 1, 1, 1, 1, 2;
1, 2, 1, 3, 1, 2, 1, 4;
1, 1, 2, 1, 1, 2, 1, 1, 3;
1, 2, 1, 2, 2, 2, 1, 2, 1, 4;
...
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CROSSREFS
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Cf. A051731, A000203, A000005.
Sequence in context: A084746 A128259 A051194 this_sequence A049843 A131374 A013632
Adjacent sequences: A134835 A134836 A134837 this_sequence A134839 A134840 A134841
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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), Nov 12 2007
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