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A263988 Number of (n+1)X(n+1) arrays of permutations of 0..(n+1)^2-1 with each element having index change +-(.,.) 0,0 or 1,2. 1
1, 4, 64, 1728, 104976, 21870000, 12656250000, 16588800000000, 55662776156160000, 524753103350661120000, 13063269877417673072640000, 823784380246050405868707840000, 135558605263753575626189314498560000 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A263989.

LINKS

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

EXAMPLE

Some solutions for n=4

..7..1..9..3..4....0..8..2..3..4....0..1..2..3..4....0..1..9..3..4

..5.13..0..8..2....5..6..7..1..9....5.13..7..8..9...12.13..7..8..2

.17.11.12..6.14...10.11.12.13.14...10.11.19..6.14...10.11..5..6.14

.15.23.10.18.19...22.23.17.18.19...22.16.24.18.12...22.16.17.18.19

.20.21.22.16.24...20.21.15.16.24...20.21.15.23.17...20.21.15.23.24

CROSSREFS

Cf. A263989.

Sequence in context: A146341 A264335 A091483 * A208357 A050636 A098698

Adjacent sequences:  A263985 A263986 A263987 * A263989 A263990 A263991

KEYWORD

nonn

AUTHOR

R. H. Hardin, Oct 31 2015

STATUS

approved

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Last modified November 15 19:18 EST 2019. Contains 329149 sequences. (Running on oeis4.)