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A189438
Number of 6Xn array permutations with each element not moving, or moving one space N, SW or SE
1
1, 41, 367, 4653, 52241, 606201, 6944573, 79826592, 916320775, 10522129613, 120807652475, 1387081546065, 15925843986549, 182854110096077, 2099453348053203, 24105043866210197, 276763962980421232
OFFSET
1,2
COMMENTS
Row 6 of A189435
LINKS
FORMULA
Empirical: a(n) = 15*a(n-1) -23*a(n-2) -262*a(n-3) +680*a(n-4) +550*a(n-5) -1875*a(n-6) +1927*a(n-7) -3037*a(n-8) +822*a(n-9) -652*a(n-10) +98*a(n-11) -33*a(n-12) +3*a(n-13) +a(n-14)
EXAMPLE
Some solutions for 6X3
..0..1..2....3..1..2....0..4..5....3..1..2....0..4..5....0..1..2....0..1..2
..3..4..5....6..0..5....6..2..1....6..0..5....3..2..1....3..4..5....3..7..5
..6..7.11....9.10..4....9..3.11....9..7..4....6..7.11....6.10.11....4.10..8
..9..8.14....7..8.11....7..8.14...12..8.14....9..8.14....9..8..7...12..6.11
.12.13.10...12.13.14...15.16.10...10.11.17...10.16.17...15.16.14...15..9.14
.15.16.17...15.16.17...13.12.17...15.16.13...15.12.13...13.12.17...13.16.17
CROSSREFS
Sequence in context: A196599 A142571 A270884 * A297586 A196576 A090211
KEYWORD
nonn
AUTHOR
R. H. Hardin Apr 22 2011
STATUS
approved