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Search: id:A166453
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| A166453 |
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Triangle by rows, square of Sierpinski's gasket, (A047999)^2 |
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+0
2
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| 1, 2, 1, 2, 0, 1, 4, 2, 2, 1, 2, 0, 0, 0, 1, 4, 2, 0, 0, 2, 1, 4, 0, 2, 0, 2, 0, 1, 8, 4, 4, 2, 4, 2, 2, 1, 2, 0, 0, 0, 0, 0, 0, 0, 1, 4, 2, 0, 0, 0, 0, 0, 0, 2, 1, 4, 0, 2, 0, 0, 0, 0, 0, 2, 0, 1
(list; table; graph; listen)
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OFFSET
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0,2
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COMMENT
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Row sums = A048883: (1, 3, 3, 9, 3, 9, 9, 27, 3, 9, 9, 27,...)
Left border = A001316
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FORMULA
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(A047999)^2, as an infinite lower triangular matrix.
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EXAMPLE
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First few rows of the triangle =
1;
2, 1;
2, 0, 1;
4, 2, 2, 1;
2, 0, 0, 0, 1;
4, 2, 0, 0, 2, 1;
4, 0, 2, 0, 2, 0, 1;
8, 4, 4, 2, 4, 2, 2, 1;
2, 0, 0, 0, 0, 0, 0, 0, 1;
4, 2, 0, 0, 0, 0, 0, 0, 2, 1;
4, 0, 2, 0, 0, 0, 0, 0, 2, 0, 1;
8, 4, 4, 2, 0, 0, 0, 0, 4, 2, 2, 1;
4, 0, 0, 0, 2, 0, 0, 0, 2, 0, 0, 0, 1;
...
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CROSSREFS
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A047999, A001316
Sequence in context: A129559 A129680 A118231 this_sequence A118233 A159955 A053838
Adjacent sequences: A166450 A166451 A166452 this_sequence A166454 A166455 A166456
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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), Oct 13 2009
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