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A078451 a(1)=1, a(n)=ceiling(n/a(a(n-1))). 0
1, 2, 2, 2, 3, 3, 4, 4, 5, 4, 6, 4, 7, 4, 8, 4, 9, 4, 10, 5, 7, 6, 8, 6, 9, 6, 9, 6, 10, 8, 8, 8, 9, 7, 9, 8, 10, 10, 10, 10, 11, 7, 11, 8, 12, 12, 12, 12, 13, 8, 13, 8, 14, 14, 14, 14, 15, 8, 15, 8, 16, 16, 16, 16, 17, 8, 17, 8, 18, 18, 18, 18, 19, 8, 19, 8, 20, 16, 20, 16, 21, 12, 21, 12, 22 (list; graph; refs; listen; history; internal format)
OFFSET

1,2

COMMENTS

If u(1)=1 u(n)=ceiling(n/u(n-1)) then u(2k)=2 and u(2k+1)=k

CROSSREFS

Sequence in context: A097508 A109964 A025778 * A071824 A114540 A183142

Adjacent sequences:  A078448 A078449 A078450 * A078452 A078453 A078454

KEYWORD

nonn

AUTHOR

Benoit Cloitre (benoit7848c(AT)orange.fr), Dec 31 2002

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Last modified February 14 13:08 EST 2012. Contains 205623 sequences.