

A154657


Number of permutations of length n within distance 8.


6



1, 1, 2, 6, 24, 120, 720, 5040, 40320, 362880, 2943360, 21898800, 152622000, 1017952680, 6623303544, 42700751022, 276054834902, 1805409270031, 12020754177001, 80930279045116, 548117873866228, 3720269813727312, 25239622338694272, 170893063638209664
(list;
graph;
refs;
listen;
history;
text;
internal format)



OFFSET

0,3


COMMENTS

a(n) equals the permanent of the n X n matrix with 1's along the central seventeen diagonals, and 0's everywhere else.  John M. Campbell, Jul 10 2011


LINKS



CROSSREFS



KEYWORD

nonn


AUTHOR



EXTENSIONS



STATUS

approved



