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2, 3, 7, 13, 61, 181, 1261, 2521, 7561, 37801, 415801, 1247401, 16216201, 113513401, 567567001, 1135134001, 19297278001, 57891834001, 1099944846001, 5499724230001, 38498069610001, 423478765710001, 9740011611330001
(list;
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refs;
listen;
history;
text;
internal format)
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OFFSET
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1,1
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COMMENTS
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a(n) = (a(n-1) - 1) * A006530(n) + 1 for n>1, a(1) = 0;
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LINKS
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Table of n, a(n) for n=1..23.
R. Zumkeller, Products of largest prime factors of numbers <= n
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CROSSREFS
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Cf. A104366, A104367, A104368, A104369, A104370, A104371, A104357, A038507, A006862.
Sequence in context: A061067 A104366 A104367 * A104372 A092969 A089136
Adjacent sequences: A104362 A104363 A104364 * A104366 A104367 A104368
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KEYWORD
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nonn
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AUTHOR
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Reinhard Zumkeller, Mar 06 2005
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STATUS
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approved
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