A264121 Number of (n+1)X(n+1) arrays of permutations of 0..(n+1)^2-1 with each element having index change +-(.,.) 0,0 1,-2 or 2,-1.

1, 9, 576, 108045, 79655625, 317072810421, 5905008685374120, 472983452271864360000

Offset

1,2

Comments

Diagonal of A264128.

Links

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

Example

Some solutions for n=4
..0..1..5..3..4....0..1..2.12..4....0..1..5.12..4....0.10..5..3.13
..2..6.16.17.18....5..3.10.17..9....2..6.16..8..9....2.15.16.11.12
.10.11..9.13.14....7..8.15.22.23...10.20..3.13.17....1..8.21..4.23
.15..7..8.21.19....6.16.20.21.19...15..7.14.18.22....6..7.17..9.19
.20.12.22.23.24...11.18.13.14.24...11.21.19.23.24...20.18.22.14.24

Crossrefs

Cf. A264128.

Sequence in context: A291910 A074731 A064560 * A095968 A233067 A067320

Adjacent sequences: A264118 A264119 A264120 * A264122 A264123 A264124

Keyword

nonn

Author

R. H. Hardin, Nov 03 2015

Status

approved