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A264279 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 0,1 1,0 or -1,-2. 0
1, 10, 132, 4484, 537057, 157344756, 126311779972, 290106175842629, 1813081182779342345 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A264285.

LINKS

Table of n, a(n) for n=1..9.

EXAMPLE

Some solutions for n=4

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

..5.13..6..7..4....5..1..6..3..8....0..5..6..3..8....5..6.14..3..8

.10.11.12..8.14...17.11.19.12.13...17.10.11.13.14...10.18.11.13..9

.15.23.17.18.19...10.16.24.18.14...22.15.12.18.19...15.16.12.17.19

.20.16.21.22.24...15.20.21.22.23...20.16.21.23.24...20.21.22.23.24

CROSSREFS

Cf. A264285.

Sequence in context: A286723 A239814 A166771 * A296637 A223407 A203325

Adjacent sequences:  A264276 A264277 A264278 * A264280 A264281 A264282

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 10 2015

STATUS

approved

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Last modified August 9 04:39 EDT 2020. Contains 336319 sequences. (Running on oeis4.)