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A111701
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Least integer obtained when n is divided by prime(1), then by prime(2), then by prime(3),..., stopping as soon as one of the primes does not divide it. In particular, a(2n-1) = 2n-1.
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3
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1, 1, 3, 2, 5, 1, 7, 4, 9, 5, 11, 2, 13, 7, 15, 8, 17, 3, 19, 10, 21, 11, 23, 4, 25, 13, 27, 14, 29, 1, 31, 16, 33, 17, 35, 6, 37, 19, 39, 20, 41, 7, 43, 22, 45, 23, 47, 8, 49, 25, 51, 26, 53, 9, 55, 28, 57, 29, 59, 2, 61, 31, 63, 32, 65, 11, 67, 34, 69, 35, 71, 12, 73, 37, 75, 38, 77
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,3
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COMMENTS
| n divided by the largest primorial that divides it.
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MATHEMATICA
| f[n_] := Block[{m = n, k = 1}, While[ IntegerQ[ m/Prime[k]], m = m/Prime[k]; k++ ]; m]; Table[ f[n], {n, 77}] (* Robert G. Wilson v *)
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CROSSREFS
| Cf. A114562.
Sequence in context: A051543 A129538 A076934 * A093527 A088233 A056008
Adjacent sequences: A111698 A111699 A111700 * A111702 A111703 A111704
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KEYWORD
| easy,nonn
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AUTHOR
| Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Aug 21 2005
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EXTENSIONS
| More terms from Robert G. Wilson v (rgwv(at)rgwv.com), Aug 25 2005
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