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Search: id:A128977
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| A128977 |
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a(0)=a(1)=1. a(n) = LCM(a(n-1)+a(n-2),n). |
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+0
1
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| 1, 1, 2, 3, 20, 115, 270, 385, 5240, 5625, 21730, 300905, 1290540, 20688785, 307710550, 328399335, 10177758160, 178604677415, 377564871150, 10567221422735, 43779145175540, 1141273698563775, 26071162562264930
(list; graph; listen)
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OFFSET
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0,3
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LINKS
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Leroy Quet, Home Page (listed in lieu of email address)
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EXAMPLE
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Since a(4)=20 and a(5)=115, we have a(6)=LCM(135,6)=270.
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MAPLE
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a[0]:=1: a[1]:=1: for n from 2 to 26 do a[n]:=lcm(a[n-1]+a[n-2], n) od: seq(a[n], n=0..26); - Emeric Deutsch (deutsch(AT)duke.poly.edu), May 06 2007
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CROSSREFS
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Cf. A113925.
Sequence in context: A052804 A125763 A042441 this_sequence A069323 A009721 A013340
Adjacent sequences: A128974 A128975 A128976 this_sequence A128978 A128979 A128980
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KEYWORD
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nonn
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AUTHOR
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Leroy Quet Apr 29 2007
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EXTENSIONS
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More terms from Emeric Deutsch (deutsch(AT)duke.poly.edu), May 06 2007
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