OFFSET
1,5
COMMENTS
Probably an erroneous version of A300003. Some inner terms of the triangle differ slightly. Sean A. Irvine reread the paper and checked manually that a(13) should be 52. The last row 1, 36, 820 ... 6352, 2 was added later and is ok. - Georg Fischer, Feb 24 2020
LINKS
J. D. Kececioglu, and D. Sankoff, Exact and approximation algorithms for sorting by reversals, with application to genome rearrangement, Algorithmica (1995) 13:180.
EXAMPLE
a(3,1) = 3 because the only three permutations of S_3 that require exactly one reversal to be sorted are (1 3 2), (2 1 3) and (3 2 1).
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
Anthony Labarre, Mar 29 2006, Jun 03 2006
STATUS
approved