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A088613
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Smallest non-squarefree multiple of n.
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0
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4, 4, 9, 4, 20, 12, 28, 8, 9, 20, 44, 12, 52, 28, 45, 16, 68, 18, 76, 20, 63, 44, 92, 24, 25, 52, 27, 28, 116, 60, 124, 32, 99, 68, 140, 36, 148, 76, 117, 40, 164, 84, 172, 44, 45, 92, 188, 48, 49, 50, 153, 52, 212, 54, 220, 56, 171, 116, 236, 60, 244, 124, 63, 64, 260, 132
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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FORMULA
| If n is non-squarefree, then a(n) = n. If n is an even squarefree integer, then a(n) = 2*n. If n is an odd squarefree multiple of 3, then a(n) = 3*n. If n is a squarefree integer not divisible by either 2 or 3, then a(n) = 4*n. a(p) = 4p if p is a prime >= 5. - Leroy Quet May 14 2008
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CROSSREFS
| Sequence in context: A023405 A160900 A035116 * A049723 A010661 A051668
Adjacent sequences: A088610 A088611 A088612 * A088614 A088615 A088616
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KEYWORD
| easy,nonn
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AUTHOR
| Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Oct 16 2003
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EXTENSIONS
| More terms from Ray Chandler (rayjchandler(AT)sbcglobal.net), Oct 18 2003
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