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A007974 Number of permutations that are n-3 "block reversals" away from 12...n. +0
1
1, 6, 52, 389, 2539, 16604 (list; graph; listen)
OFFSET

3,2
CROSSREFS

Sequence in context: A134276 A125803 A080265 this_sequence A027111 A083301 A005948

Adjacent sequences: A007971 A007972 A007973 this_sequence A007975 A007976 A007977

KEYWORD

nonn

AUTHOR

J. H. Conway (conway(AT)math.princeton.edu)

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Last modified August 29 17:54 EDT 2008. Contains 143238 sequences.

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