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A061545 Minimal XR-sequences of A048200(n). 0
0, 2, 1, 1, 1, 2, 4, 16 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

a(5) = 1 since "xrrxrrxrxr" is the shortest only sequence reversing "ABCDE".

LINKS

Table of n, a(n) for n=1..8.

EXAMPLE

For n = 6 there are 2 possibilities: A048200(6) = 15. -> Two minimal XR-sequences with length 15 exist. -> "xrxrrxrxrrxrrrx" "rxrrxrxrrxrxrrx"; so a(6) = 2.

CROSSREFS

Cf. A048200.

Sequence in context: A117211 A246576 A215894 * A241531 A221131 A126886

Adjacent sequences:  A061542 A061543 A061544 * A061546 A061547 A061548

KEYWORD

more,nonn

AUTHOR

Naohiro Nomoto, May 16 2001

STATUS

approved

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Last modified December 22 17:45 EST 2014. Contains 252365 sequences.