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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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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; refs; listen; history; internal format)
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OFFSET
| 0,3
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EXAMPLE
| Since a(4)=20 and a(5)=115, we have a(6)=LCM(135,6)=270.
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MAPLE
| 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
| Cf. A113925.
Sequence in context: A052804 A125763 A042441 * A069323 A009721 A013340
Adjacent sequences: A128974 A128975 A128976 * A128978 A128979 A128980
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KEYWORD
| nonn
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AUTHOR
| Leroy Quet Apr 29 2007
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EXTENSIONS
| More terms from Emeric Deutsch (deutsch(AT)duke.poly.edu), May 06 2007
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