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1, 1, 1, 1, 1, 1, 2, 2, 1, 1, 1, 1, 1, 1, 1, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 6, 6, 4, 4, 1, 1, 1, 1, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 9, 9, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 24, 24, 22, 15, 6, 6, 1, 1, 1, 1, 1, 1
(list; table; graph; refs; listen; history; internal format)
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OFFSET
| 1,7
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COMMENTS
| For rows >1, n-th row = all 1's iff n is prime.
Row sums = A156833: (1, 2, 3, 6, 5, 16, 7, 24, 24, 38, 11,...).
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FORMULA
| Triangle read by rows, A054525 * A156348 * A000012 A054525 = the inverse Mobius transform, A000012 = an infinite lower triangular matrix with all 1's.
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EXAMPLE
| First few rows of the triangle =
1;
1, 1;
1, 1, 1;
2, 2, 1, 1;
1, 1, 1, 1, 1;
5, 5, 3, 1, 1, 1;
1, 1, 1, 1, 1, 1, 1;
6, 6, 4, 4, 1, 1, 1, 1;
6, 6, 6, 1, 1, 1, 1, 1, 1;
9, 9, 5, 5, 5, 1, 1, 1, 1, 1;
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1;
24, 24, 22, 15, 6, 6, 1, 1, 1, 1, 1, 1;
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1;
13, 13, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1;
...
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CROSSREFS
| Cf. A156348, A054525, A156833
Sequence in context: A102681 A172086 A204014 * A172299 A025453 A094215
Adjacent sequences: A156836 A156837 A156838 * A156840 A156841 A156842
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KEYWORD
| nonn,tabl
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AUTHOR
| Gary W. Adamson and Mats Granvik (qntmpkt(AT)yahoo.com), Feb 16 2009
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