A264290 Number of (6+1)X(n+1) arrays of permutations of 0..n*7+6 with each element having directed index change 0,0 0,1 1,0 or -1,-2.

1, 476, 9724, 197283, 6080234, 157344756, 4076914388, 108938582132, 2873909666826, 75778281689996, 2000675174765756, 52737323325950072, 1389226958546893740, 36583604627425625924, 962973302936002433384

Offset

1,2

Comments

Row 6 of A264285.

Links

R. H. Hardin, Table of n, a(n) for n = 1..209

Example

Some solutions for n=4
..7..0..2..3..4....7..1..2..3..4....0..1..9..2..3....0..1..9..2..3
.12..1..6..8..9....0..5..6..8..9...12..5..6..8..4...12..6.14..7..4
..5.10.11.13.14...17.10.19.12.13...10.11..7.13.14....5.10.11..8.13
.15.16.24.18.19...15.11.16.18.14...22.15.16.17.19...15.16.24.18.19
.20.21.17.22.23...27.20.21.22.23...27.21.29.18.24...20.21.17.22.23
.32.26.27.28.29...32.26.34.28.24...20.25.26.23.28...25.26.34.28.29
.25.30.31.33.34...25.30.31.33.29...30.31.32.33.34...30.31.27.32.33

Crossrefs

Cf. A264285.

Sequence in context: A236519 A205895 A235656 * A181228 A278286 A216141

Adjacent sequences: A264287 A264288 A264289 * A264291 A264292 A264293

Keyword

nonn

Author

R. H. Hardin, Nov 10 2015

Status

approved