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A264133
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Number of (2+1)X(n+1) arrays of permutations of 0..n*3+2 with each element having index change +-(.,.) 0,0 0,2 or 1,2.
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1
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1, 13, 169, 1040, 6400, 53280, 443556, 3383280, 25806400, 203738480, 1608491236, 12558632416, 98054154496, 768752950768, 6027088830169, 47188038099235, 369450492999025, 2893968831142495, 22668952280018641, 177540636808778880
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OFFSET
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1,2
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COMMENTS
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LINKS
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EXAMPLE
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Some solutions for n=4
..0..3..4..1..2....0..1..9..3..4....0..1..4..3..2....2..1..0..3..4
..5..8.14..6..9....7..6..5..8..2....5..8..7..6..9....7..6.14..8..9
.12.13.10.11..7...10.13.12.11.14...10.11.14.13.12...10.11..5.13.12
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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