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Search: id:A089080
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A089080 Sequence is S(infinity) where S(1)={1,2} and S(n)=S(n-1)S'(n-1), where S'(k) is obtained from S(k) by replacing the single 1 by the least integer not occurring in S(k). +0
3
1, 2, 3, 2, 4, 2, 3, 2, 5, 2, 3, 2, 4, 2, 3, 2, 6, 2, 3, 2, 4, 2, 3, 2, 5, 2, 3, 2, 4, 2, 3, 2, 7, 2, 3, 2, 4, 2, 3, 2, 5, 2, 3, 2, 4, 2, 3, 2, 6, 2, 3, 2, 4, 2, 3, 2, 5, 2, 3, 2, 4, 2, 3, 2, 8, 2, 3, 2, 4, 2, 3, 2, 5, 2, 3, 2, 4, 2, 3, 2, 6, 2, 3, 2, 4, 2, 3, 2, 5, 2, 3, 2, 4, 2, 3, 2, 7, 2, 3, 2, 4, 2, 3, 2, 5 (list; graph; listen)
OFFSET

1,2

FORMULA

sum(k=1, n, a(k))= 3*n+O(log(n)) ( sum(k=1, n, a(k))< 3*n )

EXAMPLE

S(1)={1,2} then S'(1)={3,2} and sequence begins 1,2,3,2

CROSSREFS

Essentially the same as A085058.

Sequence in context: A050206 A127237 A066482 this_sequence A123725 A085058 A080771

Adjacent sequences: A089077 A089078 A089079 this_sequence A089081 A089082 A089083

KEYWORD

nonn

AUTHOR

Benoit Cloitre (benoit7848c(AT)orange.fr), Dec 04 2003

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Last modified December 10 00:48 EST 2009. Contains 170565 sequences.


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