A189252 Number of nX7 array permutations with each element making zero or one king moves

21, 456320, 1070959431, 5025023852501, 19568579061640704, 81032653651506521333, 330453235652954061843137, 1355117057188899341581651072, 5550437831744113835993347187363

Offset

1,1

Comments

Column 7 of A189254

Links

R. H. Hardin, Table of n, a(n) for n = 1..42

Example

Some solutions for 3X7
..0..1..2..9..3..4..5....0..1..2..9..3..4..5....0..1..2..9..3..4..5
.15.16.10.11.18.13..6...14..8.15.11.19.12..6...14.16..8.18.11..6.19
.14..7..8.17.12.19.20....7.16.17.10.18.13.20....7.15.10.17.12.20.13

Crossrefs

Sequence in context: A203673 A172854 A143736 * A173518 A033636 A138080

Adjacent sequences: A189249 A189250 A189251 * A189253 A189254 A189255

Keyword

nonn

Author

R. H. Hardin Apr 19 2011

Status

approved