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Search: id:A143038
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| A143038 |
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Triangle read by rows, A000012 * A134309 * A000012; where A134309 = an infinite lower triangular matrix with (1, 1, 2, 4, 8, 16,...) in the main diagonal and the rest zeros. |
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+0
2
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| 1, 1, 2, 2, 3, 4, 4, 6, 7, 8, 8, 12, 14, 15, 16, 16, 24, 28, 30, 31, 32, 32, 48, 56, 60, 62, 63, 64, 64, 96, 112, 120, 124, 126, 127, 128, 128, 192, 224, 240, 248, 252, 254, 255, 256, 256, 384, 448, 480, 496, 504, 508, 510, 511, 512
(list; table; graph; listen)
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OFFSET
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0,3
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COMMENT
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Row sums = A002064, the Cullen numbers (1, 3, 9, 25, 65, 161, 385,...).
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EXAMPLE
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First few rows of the triangle are:
1;
1, 2;
2, 3, 4;
4, 6, 7, 8;
8, 12, 14, 15, 16;
16, 24, 28, 30, 21, 32;
32, 48, 56, 60, 62, 63, 64;
...
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CROSSREFS
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Cf. A134309, A002064.
Sequence in context: A029936 A114093 A077768 this_sequence A029040 A053281 A094997
Adjacent sequences: A143035 A143036 A143037 this_sequence A143039 A143040 A143041
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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), Jul 18 2008
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