A263585 Number of (n+1)X(4+1) arrays of permutations of 0..n*5+4 filled by rows with each element moved a city block distance of 1 or 2, and rows and columns in increasing lexicographic order.

31, 27650, 8296414, 3822509358, 1954083613268, 950842128976830, 464444435832491663, 229893908518453257427

Offset

1,1

Comments

Column 4 of A263586.

Links

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

Example

Some solutions for n=2
..2..3..4..7.14....1..2..3..4.14....5..6..8.13.14....5..6.12.13.14
.10..0..5..6.13....7..0..5.13..8...10..0..1..3..4...10..0..8..9..3
.11..1..8.12..9...11.10..6..9.12...11..7..2..9.12...11..1..2..7..4

Crossrefs

Cf. A263586.

Sequence in context: A292009 A086122 A239167 * A176349 A262716 A033176

Adjacent sequences: A263582 A263583 A263584 * A263586 A263587 A263588

Keyword

nonn

Author

R. H. Hardin, Oct 22 2015

Status

approved