A264112 Number of (2+1)X(n+1) arrays of permutations of 0..n*3+2 with each element having index change +-(.,.) 0,0 0,2 or 1,1.

4, 40, 441, 2745, 21025, 167464, 1336336, 10277652, 80568576, 631845004, 4952218384, 38731564472, 303450044769, 2376946740975, 18616368579561, 145790870490104, 1141923459200164, 8943885706383975, 70049807131516081

Offset

1,1

Comments

Row 2 of A264110.

Links

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

Example

Some solutions for n=4
..2..3..0..1..4....2..3..0..1..4....0..1..4..3..2....6..1..2..9..4
.11..6..7..8..9....5..8..7..6..9....5..6..7..8..9....5..0.13.14..3
.10..5.12.13.14...10.13.12.11.14...12.11.10.13.14...12.11.10..7..8

Crossrefs

Cf. A264110.

Sequence in context: A278036 A221588 A114468 * A372460 A304447 A370444

Adjacent sequences: A264109 A264110 A264111 * A264113 A264114 A264115

Keyword

nonn

Author

R. H. Hardin, Nov 03 2015

Status

approved