A264540 Number of (7+1)X(n+1) arrays of permutations of 0..n*8+7 with each element having directed index change -2,-2 -1,0 0,1 or 1,0.

1, 316, 3273, 59259, 1270837, 22000750, 434877820, 7956766442, 145179765157, 2721929529883, 49938237730629, 921931916235879, 17054303884627492, 314243411820771632, 5803492808415667616, 107123397799486933822

Offset

1,2

Comments

Row 7 of A264534.

Links

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

Example

Some solutions for n=4
..5.13.14..8..9....5.13..7..2..9...12.13.14..2..3....5.13.14..8..9
..0..1..2..3..4....0..1.12..3..4....0..1.19..7..4....0..1..2..3..4
.15..6..7.12.19...15..6.24..8.19....5..6.11..8..9...15..6..7.18.19
.10.11.22.17.24...10.11.29.17.14...10.15.22.17.18...10.11.12.17.24
.25.16.34.18.23...32.16.21.18.23...25.16.21.28.23...32.16.21.22.23
.20.21.39.27.28...20.25.22.33.34...20.38.39.33.24...20.25.39.33.28
.35.26.37.32.29...35.26.27.28.39...35.26.27.32.29...35.26.27.38.29
.30.31.36.33.38...30.31.36.37.38...30.31.36.37.34...30.31.36.37.34

Crossrefs

Cf. A264534.

Sequence in context: A179155 A237561 A358926 * A253689 A233048 A101112

Adjacent sequences: A264537 A264538 A264539 * A264541 A264542 A264543

Keyword

nonn

Author

R. H. Hardin, Nov 17 2015

Status

approved