

A057543


Maximum cycle length (orbit size) in the rotation permutation of 2n noncrossing handshakes.


8



1, 1, 2, 3, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 34, 36, 38, 40, 42, 44, 46, 48, 50, 52
(list;
graph;
refs;
listen;
history;
text;
internal format)



OFFSET

0,3


COMMENTS

I.e. in permutations A057501 and A057502, the longest cycle among all cycles between the A014138[n2]+1th and A014138[n1]th terms.


LINKS

Table of n, a(n) for n=0..26.


FORMULA

a(0)=1, a(1)=1, a(2)=2, a(3)=3, a(n)=2n


CROSSREFS

Cf. A057542, A057544, A057545.
Sequence in context: A028732 A028751 A325424 * A190650 A000059 A216761
Adjacent sequences: A057540 A057541 A057542 * A057544 A057545 A057546


KEYWORD

nonn


AUTHOR

Antti Karttunen, Sep 07 2000


STATUS

approved



