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A264555 Number of (6+1)X(n+1) arrays of permutations of 0..n*7+6 with each element having directed index change -1,1 -1,2 1,0 or 0,-1. 1
0, 44, 400, 4640, 105081, 1994830, 29691127, 480994368, 8117368800, 132754460552, 2133045608920, 34553147199456, 560889832726788, 9059789552261840, 146150531190902752, 2359511442598185984, 38084486000051713136 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Row 6 of A264550.

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..190

EXAMPLE

Some solutions for n=4

..1..5..6..4..8....1..2..6..4..8....1..2..3..7..8....1..2..3..4..7

..0..7..2..3.13....0..7.11..3.13....0.10.11.12..4....0.10.11..9.12

.11.15.16.14..9....5.12.16.14..9....5..6.13.14..9....5..6.15..8.18

.10.20.12.19.23...10.17.21.19.22...16.17.21.19.22...16.17.20.13.14

.21.22.17.18.28...15.25.26.18.28...15.25.26.18.27...21.22.23.27.19

.26.27.30.31.24...20.27.30.23.24...20.30.28.23.24...26.30.28.31.24

.25.32.33.34.29...31.32.33.34.29...31.32.33.34.29...25.32.33.34.29

CROSSREFS

Cf. A264550.

Sequence in context: A190420 A228464 A190605 * A231217 A250336 A250337

Adjacent sequences:  A264552 A264553 A264554 * A264556 A264557 A264558

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 17 2015

STATUS

approved

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Last modified June 20 00:47 EDT 2019. Contains 324223 sequences. (Running on oeis4.)