A263544 Number of (n+2) X (2+2) arrays of permutations of 0..n*4+7 with each element moved 0 or 1 knight moves and no more than 3 elements left unmoved.

124, 3328, 32284, 692605, 12621312, 200111881, 3073784448, 48234458624, 726559223488, 10674709271961, 154988254877760, 2223132289418925, 31457320738329980, 440684546504612096, 6122020250516984604

Offset

1,1

Comments

Column 2 of A263545.

Links

R. H. Hardin, Table of n, a(n) for n = 1..63

Example

Some solutions for n=3
..6..8..2..3....6..7..9..3....9..1..4.10....6..7..4.10....0..7..4.10
.10.11..0.14...13.11..8..1....2..3.15..7....2.12.15.14....2..3..8..9
..1..7.19..5...14..0..4..2....6..0.12..5....1..0..3.11....1.16.19.18
.18..4.16.17...18.19..5.17...18.19.16.17....5.19.16.17...12..6..5.17
..9.15.12.13...16.15.12.10...14..8.11.13....9..8.18.13...14.15.11.13

Crossrefs

Cf. A263545.

Sequence in context: A024017 A260097 A232796 * A253007 A293084 A289299

Adjacent sequences: A263541 A263542 A263543 * A263545 A263546 A263547

Keyword

nonn

Author

R. H. Hardin, Oct 20 2015

Status

approved