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A080968 Orbit size of each branch-reduced tree encoded by A080981(n) under Donaghey's "Map M" Catalan automorphism. 4
1, 1, 2, 2, 3, 3, 3, 6, 6, 6, 6, 6, 6, 3, 2, 3, 5, 3, 5, 5, 5, 5, 3, 3, 2, 3, 6, 24, 24, 24, 24, 6, 24, 24, 24, 6, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 6, 24, 24, 24, 24, 24, 6, 24, 24, 6, 3, 18, 9, 24, 18, 18, 9, 18, 9, 18, 18, 3, 24, 15, 15, 24, 24, 18, 15, 15, 24, 3, 24, 24, 15, 15, 24 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

COMMENTS

This is the size of the cycle containing A080980(n) in the permutations A057505/A057506.

If the conjecture given in A080070 is true, then this sequence contains only six 2's. Questions: are there any (other) values with finite number of occurrences? Which primes will eventually appear?

LINKS

Table of n, a(n) for n=0..82.

FORMULA

a(n) = A080967(A080980(n))

CROSSREFS

Cf. A080969, A080972.

Sequence in context: A169618 A175454 A157501 * A115733 A025496 A099959

Adjacent sequences:  A080965 A080966 A080967 * A080969 A080970 A080971

KEYWORD

nonn

AUTHOR

Antti Karttunen Mar 02 2003

STATUS

approved

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Last modified June 18 14:52 EDT 2019. Contains 324213 sequences. (Running on oeis4.)