A263588 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 1 or 2, and rows and columns in increasing lexicographic order.

4, 134, 1992, 27650, 343431, 3777963, 38762619, 377102980, 3519017214, 31782863567, 279755669078, 2411988669554, 20450270031430, 171047927517261, 1414934370045463, 11599885089631470, 94407727875281839, 763843712572305864

Offset

1,1

Comments

Row 2 of A263586.

Links

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

Example

Some solutions for n=4
..2..5..6..9.14....1..2..3..4.14....1..2..3..8..9....1..5..6..7..9
..7..0..1.12..8....6..0..5..9..7....7..0.11..6..4...10..0..8..2.13
.11.10.13..3..4...11.12.10..8.13...12..5.10.14.13...11.12.14..3..4

Crossrefs

Cf. A263586.

Sequence in context: A146547 A274703 A045482 * A006429 A016483 A102986

Adjacent sequences: A263585 A263586 A263587 * A263589 A263590 A263591

Keyword

nonn

Author

R. H. Hardin, Oct 22 2015

Status

approved