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A263543
Number of (n+2)X(1+2) arrays of permutations of 0..n*3+5 with each element moved 0 or 1 knight moves and no more than 3 elements left unmoved.
1
20, 124, 884, 2960, 43808, 128576, 1845824, 4709632, 81157632, 178660352, 3316698112, 6604263424, 133509988352, 239908012032, 5214639587328, 8606659641344, 199846903939072, 304546373959680, 7521392965976064
OFFSET
1,1
COMMENTS
Column 1 of A263545.
LINKS
EXAMPLE
Some solutions for n=4
..7..8..2....0..8..7....0..6..3....5..8..7....5..8..2....7..8..3....5..8..7
.10.11..6....3.11.10....2..9.10....3..9..0...10.11..0....2..9..0....2..9.10
..5..0..1....1..2.13....1.14.13....1..2.13...13.12..1....6.14..1...13..0..1
..4..3.16...16..5..4....4..5.16...16.15..4...16..3..4...16..5..4....4..3.16
.17.13.15...17..6.15...17..8..7...17..6.14....7..6.15...17.13.15...17..6.15
.14..9.12...14..9.12...15.11.12...10.11.12...14..9.17...10.11.12...14.11.12
CROSSREFS
Cf. A263545.
Sequence in context: A222859 A263545 A227057 * A249709 A250648 A250421
KEYWORD
nonn
AUTHOR
R. H. Hardin, Oct 20 2015
STATUS
approved