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A007973 Number of permutations that are n-2 "block reversals" away from 12...n. +0
1
1, 3, 15, 55, 184, 648, 2111 (list; graph; listen)
OFFSET

2,2
CROSSREFS

Sequence in context: A093925 A119113 A152896 this_sequence A015249 A084152 A084175

Adjacent sequences: A007970 A007971 A007972 this_sequence A007974 A007975 A007976

KEYWORD

nonn

AUTHOR

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

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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