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Search: id:A097382
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| A097382 |
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a(h) = d(h,j) = lcm( f(h,j,1) ... f(h,j,h) ), when j=2. |
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+0
2
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| 1, 4, 35, 20, 3003, 560, 692835, 4620, 185910725, 48048, 136745788725, 1361360, 4281195077775, 22170720, 6541380665835015, 446185740, 1898924328582105825, 5949143200, 90048990529077755175
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OFFSET
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1,2
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COMMENT
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See A091342, A025558
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FORMULA
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Given (1) f(h, j, a) = ( [ ((a/gcd(a, h)) / gcd(j+1, (a/gcd(a, h)))) * (h(j+1)) ] - [ ((a/gcd(a, h)) / gcd(j+1, (a/gcd(a, h)))) * (ja) ]) / a then let (2) a(h) = d(h, j) = lcm( f(h, j, 1) ... f(h, j, h) )
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EXAMPLE
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a(2) = 4 = lcm(4,1)
a(5) = 3003 = lcm(13,11,3,7,1)
a(6) = 560 = lcm(16,7,4,5,8,1)
a(13) = 4281195077775 = lcm(37,35,11,31,29,9,25,23,7,19,17,5,1)
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CROSSREFS
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Sequence in context: A055621 A000860 A027681 this_sequence A003349 A068968 A011195
Adjacent sequences: A097379 A097380 A097381 this_sequence A097383 A097384 A097385
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KEYWORD
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nonn
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AUTHOR
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Scott C Macfarlan (scottmacfarlan(AT)covance.com), Sep 18 2004
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