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A179960
Number of permutations of 1..n with no adjacent elements within 6 in value.
0
1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 768, 98408, 6433728, 305193408, 11902581120, 412583686272
OFFSET
0,15
CROSSREFS
Sequence in context: A247080 A145124 A102969 * A344663 A167448 A320481
KEYWORD
nonn
AUTHOR
R. H. Hardin, Aug 03 2010
EXTENSIONS
a(0)-a(12), a(20) from Alois P. Heinz, Dec 01 2018
STATUS
approved