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A264358 Number of (n+1)X(n+1) arrays of permutations of 0..(n+1)^2-1 with each element having directed index change 0,0 0,2 1,0 or -1,-2. 0
1, 6, 169, 7168, 831744, 353333680, 450847788304, 1591640798421348 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A264364.

LINKS

Table of n, a(n) for n=1..8.

EXAMPLE

Some solutions for n=4

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

..0..6..5..3..4...12..1..2..6..7....5..6..2..3..7....5..6..2..8..7

.17.11.10.13.12....5.18.19.11.14...17.11.10.13.12...17.18.10.11.14

.15.16.24.18.14...10.16.15.13.17...15.23.24.18.14...22.16.12.13.19

.20.21.22.23.19...20.21.22.23.24...20.16.22.21.19...15.21.20.23.24

CROSSREFS

Cf. A264364.

Sequence in context: A306837 A002884 A198176 * A264796 A266852 A266311

Adjacent sequences:  A264355 A264356 A264357 * A264359 A264360 A264361

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 12 2015

STATUS

approved

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Last modified June 24 23:57 EDT 2021. Contains 345445 sequences. (Running on oeis4.)