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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
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
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 17 2015
STATUS
approved

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Last modified February 26 05:55 EST 2024. Contains 370335 sequences. (Running on oeis4.)