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A264112
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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 1,1.
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1
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4, 40, 441, 2745, 21025, 167464, 1336336, 10277652, 80568576, 631845004, 4952218384, 38731564472, 303450044769, 2376946740975, 18616368579561, 145790870490104, 1141923459200164, 8943885706383975, 70049807131516081
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