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A147634
Number of permutations of 1..n with each sum of three adjacent terms unique.
0
1, 2, 6, 16, 54, 232, 936, 4136, 19112, 98666, 559598, 3448160, 22951024, 164020894, 1255124388, 10182613618, 87879918338
OFFSET
1,2
CROSSREFS
Cf. A091217.
Sequence in context: A147726 A147916 A147907 * A147899 A147949 A147940
KEYWORD
nonn,more
AUTHOR
R. H. Hardin, Nov 09 2008
EXTENSIONS
More terms from R. H. Hardin, Nov 11 2008
STATUS
approved