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A264111
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Number of (1+1)X(n+1) arrays of permutations of 0..n*2+1 with each element having index change +-(.,.) 0,0 0,2 or 1,1.
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1
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2, 9, 45, 144, 512, 1936, 7381, 27225, 101250, 378225, 1413721, 5271616, 19668992, 73410624, 274002345, 1022528529, 3816059522, 14241796921, 53151529861, 198363344400, 740301120000, 2762842352400, 10311073884541, 38481439562281
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