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Search: id:A126069
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| 1, 1, 4, 5, 11, 4, 29, 9, 19, 11, 199, 4, 521, 29, 31, 49, 3571, 19, 9349, 25, 211, 199, 64079, 36, 15251
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OFFSET
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1,3
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REFERENCES
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A 2001 Iranian Mathematical Olympiad question shows that such a generating sequence {a(n)} exists for the sequence {S(n)} whenever gcd(S(m),S(n)) = S(gcd(m,n)).
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EXAMPLE
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The divisors of 6 are 1,2,3,6 and a(1)*a(2)*a(3)*a(6)=1*1*4*4=16, which is, in fact, A001350(6).
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CROSSREFS
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Cf. A001350, A061446.
Sequence in context: A109675 A052508 A074098 this_sequence A147559 A007429 A064945
Adjacent sequences: A126066 A126067 A126068 this_sequence A126070 A126071 A126072
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KEYWORD
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nonn
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AUTHOR
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John W. Layman (layman(AT)math.vt.edu), Feb 28 2007
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