A263604 Number of (2+1)X(n+1) arrays of permutations of 0..n*3+2 filled by rows with each element moved a city block distance of 0 or 2, and rows and columns in increasing lexicographic order.

8, 144, 1687, 13455, 105222, 747253, 4989566, 31815696, 196013762, 1173794801, 6879522980, 39647344852, 225498976846, 1269417494533, 7089353635990, 39349093751221, 217373402514233, 1196483044612241, 6567697656267061

Offset

1,1

Comments

Row 2 of A263602.

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

R. H. Hardin, Empirical recurrence of order 73

Formula

Empirical recurrence of order 73 (see link above)

Example

Some solutions for n=4
..0..1..2..3..8....0..5..6..9.14....0..5..6.13.14....0..1..6.13.14
..5..6.13..4..9...11.10..1..4..3....1.12..7..4..3....5..2..3..4..9
.10..7.14.11.12...12..7..2.13..8...10.11..2..9..8...10..7.12.11..8

Crossrefs

Cf. A263602.

Sequence in context: A370071 A241229 A274730 * A212703 A065409 A061899

Adjacent sequences: A263601 A263602 A263603 * A263605 A263606 A263607

Keyword

nonn

Author

R. H. Hardin, Oct 22 2015

Status

approved