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Search: id:A111059
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| A111059 |
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Product{k=1 to n} (A005117(k)), the product of the first n squarefree positive integers. |
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+0
2
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| 1, 2, 6, 30, 180, 1260, 12600, 138600, 1801800, 25225200, 378378000, 6432426000, 122216094000, 2566537974000, 56463835428000, 1298668214844000, 33765373585944000, 979195833992376000, 29375875019771280000
(list; graph; listen)
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OFFSET
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1,2
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LINKS
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Leroy Quet, Home Page (listed in lieu of email address)
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EXAMPLE
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Since the first 6 squarefree positive integers are 1, 2, 3, 5, 6, 7, the 6th term of the sequence is 1*2*3*5*6*7 = 1260.
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PROGRAM
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(PARI) m=30; k=1; for(n=1, m, if(issquarefree(n), print1(k=k*n, ", ")))
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CROSSREFS
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Cf. A005117.
Sequence in context: A057221 A127115 A096769 this_sequence A009645 A112385 A078700
Adjacent sequences: A111056 A111057 A111058 this_sequence A111060 A111061 A111062
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KEYWORD
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nonn
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AUTHOR
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Leroy Quet Oct 07 2005
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EXTENSIONS
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More terms from Klaus Brockhaus (klaus-brockhaus(AT)t-online.de), Oct 08 2005
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