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1, 1, 0, 2, 1, 0, 2, 0, 1, 0, 4, 2, 1, 1, 0, 2, 0, 0, 0, 1, 0, 6, 3, 2, 1, 1, 1, 0, 4, 0, 1, 0, 1, 0, 1, 0, 6, 3, 0, 2, 1, 0, 1, 1, 0, 4, 0, 2, 0, 0, 0, 1, 0, 1, 0, 10, 5, 3, 2, 2, 1, 1, 1, 1, 1, 0, 4, 0, 0, 0, 1, 0, 1, 0, 0, 0, 1, 0, 12, 6, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 0, 6, 0, 2, 0, 10, 0, 0, 1, 0, 10, 1, 0
(list; table; graph; refs; listen; history; internal format)
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OFFSET
| 1,4
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COMMENTS
| Left border = phi(n), A000010: (1, 1, 2, 2, 4, 2, 6,...).
Row sums = A143615: (1, 1, 3, 3, 8, 3, 14, 7,...).
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FORMULA
| Triangle read by rows, A054521 * A051731, 1<=k<=n. A054521 records the relative primes of n, indicated by a 1's in row n, 0 otherwise. A051731 = the inverse Mobius transform, in which 1's by rows indicate the divisors of n, 0 otherwise.
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EXAMPLE
| First few rows of the triangle =
1;
1, 0;
2, 1, 0;
2, 0, 1, 0;
4, 2, 1, 1, 0;
2, 0, 0, 0, 1, 0;
6, 3, 2, 1, 1, 1, 0;
4, 0, 1, 0, 1, 0, 1, 0;
6, 3, 0, 2, 1, 0, 1, 1, 0;
...
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CROSSREFS
| Cf. A051731, A054521, A000010, A143615.
Sequence in context: A033768 A033786 A137696 * A071412 A080884 A091392
Adjacent sequences: A143611 A143612 A143613 * A143615 A143616 A143617
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KEYWORD
| nonn,tabl
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AUTHOR
| Gary W. Adamson (qntmpkt(AT)yahoo.com), Aug 27 2008
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