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A263705 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 equal numbers of elements advancing and retreating in the array numbered in row major order. 1
475, 18995, 437533, 13341380, 414860767, 13151405753, 409464954596, 13041097884324, 416984172658896, 13411256346548047, 432777590466469475, 14030980958229441618, 456328306237092974195, 14885590516436588260515 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A263706.

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..15

EXAMPLE

Some solutions for n=2

..0..1.11.10....0.10..4..3....9..1..2..5....6..8..4.10....0..1..2..5

..4..5.13..7....2.12..6.14...13..3..6.14....2..3..0.14....4.12..6..7

.14..9..3..2....8.15..1.13....8..0.10.11....1.15.12.13....8.15..3.11

.12..6..8.15....5.11..7..9...12..4..7.15....5.11..7..9...10.13.14..9

CROSSREFS

Cf. A263706.

Sequence in context: A165463 A252518 A210048 * A048428 A253395 A171077

Adjacent sequences:  A263702 A263703 A263704 * A263706 A263707 A263708

KEYWORD

nonn

AUTHOR

R. H. Hardin, Oct 24 2015

STATUS

approved

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Last modified October 28 19:21 EDT 2020. Contains 338064 sequences. (Running on oeis4.)