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1, 4, 2, 18, 18, 6, 6, 9, 6, 6, 150, 75, 75, 150, 30, 30, 75, 25, 75, 30, 30, 1470, 735, 1225, 1225, 735, 1470, 210, 210, 735, 245, 1225, 245, 735, 210, 210, 210, 105, 245, 245, 245, 245, 105, 210, 210, 210, 105, 35, 245, 49, 245, 35, 105, 210, 210
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refs;
listen;
history;
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OFFSET
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1,2
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COMMENTS
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A034386(0) is interpreted as 1 here, where n=m.
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LINKS
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Table of n, a(n) for n=1..55.
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EXAMPLE
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The triangle starts in row n=1 as:
1
4, 2
18, 18, 6
6, 9, 6, 6
150, 75, 75, 150, 30
30, 75, 25, 75, 30, 30
1470, 735, 1225, 1225, 735, 1470, 210
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MATHEMATICA
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f[n_] := If[PrimeQ[n] == True, n, 1] cf[0] = 1; cf[n_Integer?Positive] := cf[n] = f[n]*cf[n - 1] bf[n_Integer?Positive, m_Integer?Positive] := bf[n, m] = cf[n]^2/(cf[m]*cf[n - m]) b = Table[Table[bf[n, m], {m, 1, n}], {n, 1, 10}] Flatten[b]
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CROSSREFS
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Cf. A034386.
Sequence in context: A257505 A152883 A285793 * A052966 A305135 A177248
Adjacent sequences: A117689 A117690 A117691 * A117693 A117694 A117695
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KEYWORD
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nonn,tabl
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AUTHOR
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Roger L. Bagula, Apr 12 2006
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EXTENSIONS
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Offset corrected by the Assoc. Eds. of the OEIS, Jun 27 2010
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STATUS
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approved
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