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A143620
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Triangle read by rows, square of A054521, 1<=k<=n.
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1
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1, 1, 0, 2, 0, 0, 2, 1, 0, 0, 4, 1, 1, 0, 0, 2, 1, 1, 1, 0, 0, 6, 2, 2, 1, 1, 0, 0, 4, 3, 2, 2, 1, 1, 0, 0, 6, 2, 4, 2, 2, 1, 1, 0, 0, 4, 3, 1, 2, 2, 1, 1, 1, 0, 0, 10, 4, 5, 3, 4, 1, 3, 1, 1, 0, 0, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 0, 0
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,4
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COMMENTS
| Left border = phi(n), A000010.
Row sums = A053570: (1, 1, 2, 3, 6, 5, 12, 13,...).
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FORMULA
| Triangle read by rows, square of A054521, 1<=k<=n
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EXAMPLE
| First few rows of the triangle =
1;
1, 0;
2, 0, 0;
2, 1, 0, 0;
4, 1, 1, 0, 0;
2, 1, 1, 1, 0, 0;
6, 2, 2, 1, 1, 0, 0;
4, 3, 2, 2, 1, 1, 0, 0;
6, 2, 4, 2, 2, 1, 1, 0, 0;
...
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CROSSREFS
| Cf. A054521, A000010, A053570.
Sequence in context: A134109 A170978 A161364 * A025843 A178580 A035437
Adjacent sequences: A143617 A143618 A143619 * A143621 A143622 A143623
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KEYWORD
| nonn
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AUTHOR
| Gary W. Adamson (qntmpkt(AT)yahoo.com), Aug 27 2008
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