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A264508
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Number of (2+1)X(n+1) arrays of permutations of 0..n*3+2 with each element having directed index change -1,1 0,-1 0,1 or 1,0.
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1
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2, 2, 14, 38, 137, 432, 1417, 4554, 14710, 47394, 152762, 492284, 1586369, 5112128, 16473473, 53085636, 171065674, 551254626, 1776394534, 5724372546, 18446568521, 59443412528, 191554172489, 617276369198, 1989150291038, 6409964077506
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