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A160257
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a(n) = b(n+2)*b(n+1)/b(n), where b() = A160256().
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2
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6, 6, 8, 12, 12, 18, 32, 27, 16, 5, 25, 15, 6, 108, 20, 64, 25, 21, 14, 240, 21, 270, 28, 320, 35, 375, 42, 432, 49, 110, 22, 1680, 33, 1890, 44, 2240, 55, 2625, 66, 3024, 77, 3430, 88, 3840, 99, 4725, 11, 567, 55, 168, 110, 126, 1320, 378, 2640, 1134, 3520, 1701
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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COMMENTS
| By definition, each term of this sequence is a positive integer.
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LINKS
| Alois P. Heinz, Table of n, a(n) for n = 1..10000
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MAPLE
| bb:= proc(n) option remember; false end: b:= proc(n) option remember; local k, m; if n<3 then bb(n):= true; n else m:= denom (b(n-1) /b(n-2)); for k from m by m while bb(k) do od; bb(k):= true; k fi end: a:= n-> b(n+2) *b(n+1) /b(n): seq (a(n), n=1..100); [From Alois P. Heinz (heinz(AT)hs-heilbronn.de), May 18 2009]
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CROSSREFS
| Cf. A075076, A160256
Sequence in context: A175217 A000509 A141218 * A183042 A083507 A157320
Adjacent sequences: A160254 A160255 A160256 * A160258 A160259 A160260
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KEYWORD
| nonn
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AUTHOR
| Leroy Quet, May 06 2009
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EXTENSIONS
| More terms from Alois P. Heinz (heinz(AT)hs-heilbronn.de), May 18 2009
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