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A131120
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a(1)=1. a(n+1) = n!/LCM(a(1),a(2),...,a(n)).
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2
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1, 1, 2, 3, 4, 10, 12, 84, 96, 108, 120, 1320, 1440, 18720, 20160, 151200, 483840, 1028160, 1088640, 2298240, 2419200, 50803200, 159667200, 1836172800, 1916006400, 11975040000, 12454041600, 336259123200, 348713164800
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,3
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EXAMPLE
| The LCM of the first 7 terms is 60. So a(8) = 7!/60 = 84.
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MAPLE
| A131120 := proc(n) option remember ; if n = 1 then 1; else (n-1)!/lcm(seq(A131120(i), i=1..n-1)) ; fi ; end: seq(A131120(n), n=1..40) ; - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Oct 17 2007
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CROSSREFS
| Cf. A131121.
Sequence in context: A005456 A100773 A193775 * A115195 A095384 A177084
Adjacent sequences: A131117 A131118 A131119 * A131121 A131122 A131123
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KEYWORD
| nonn
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AUTHOR
| Leroy Quet Jun 15 2007
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EXTENSIONS
| More terms from R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Oct 17 2007
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