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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 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 1 of A263545.

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

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

Adjacent sequences:  A263540 A263541 A263542 * A263544 A263545 A263546

KEYWORD

nonn

AUTHOR

R. H. Hardin, Oct 20 2015

STATUS

approved

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Last modified October 31 19:00 EDT 2020. Contains 338111 sequences. (Running on oeis4.)