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1, 2, 1, 4, 2, 2, 8, 4, 6, 2, 16, 8, 12, 8, 4, 32, 16, 22, 20, 20, 2, 64, 32, 42, 40, 60, 12, 6, 128, 64, 84, 72, 140, 42, 42, 4, 256, 128, 170, 128, 280, 112, 168, 32, 6, 512, 256, 342, 240, 508, 252, 504, 144, 54, 4
(list; table; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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COMMENTS
| Row sums = A001792, (1, 3, 8, 20, 48, 112,...) binomial transform of the natural numbers. Right border = phi(n), A000010: (1, 1, 2, 2, 4, 2, 6, 4,...).
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FORMULA
| Binomial transform of A054522 as infinite lower triangular matrices.
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EXAMPLE
| First few rows of the triangle are:
1;
2, 1;
4, 2, 2;
8, 4, 6, 2;
16, 8, 12, 8, 4;
32, 16, 22, 20, 20, 2;
64, 32, 42, 40, 60, 12, 6;
...
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CROSSREFS
| Cf. A007318, A054522, A001792, A130585, A000010.
Sequence in context: A104733 A201703 A153281 * A078458 A033317 A183200
Adjacent sequences: A130581 A130582 A130583 * A130585 A130586 A130587
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KEYWORD
| nonn,tabl
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AUTHOR
| Gary W. Adamson (qntmpkt(AT)yahoo.com), Jun 06 2007
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