A263957 Number of (2+2)X(n+2) arrays of permutations of 0..n*4+7 filled by rows with each element moved 0 or 1 knight moves, and rows and columns in increasing lexicographic order.

36, 606, 5900, 63788, 832934, 9289071, 99951445, 1070561979, 11300737242, 115663751102, 1170494128201, 11772196090023, 117664907435464, 1168237449914666, 11549482457545769, 113905143883265304

Offset

1,1

Comments

Row 2 of A263955.

Links

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

Example

Some solutions for n=4
..0..1..2..3.15.16....0..1.10.14.15.16....0..1..2..3..4..5....0..1..2..3..4..5
..6..7.12.20.23.11....6..7.21.13..2.11....6.20.12.22.23.11....6..7..8.17.10.15
..8.21.22..4..5.17...12..9..3..4..5.17....8.21.14.15.16.17...12.21.14.11.16..9
.18.19..9.13.14.10...18.19.20..8.22.23...18.19..7.13..9.10...18.19.20.13.22.23

Crossrefs

Cf. A263955.

Sequence in context: A226284 A223271 A151597 * A323974 A126926 A163720

Adjacent sequences: A263954 A263955 A263956 * A263958 A263959 A263960

Keyword

nonn

Author

_R. H. Hardin_, Oct 30 2015

Status

approved