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A264487
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Number of (n+1)X(4+1) arrays of permutations of 0..n*5+4 with each element having directed index change 2,-1 1,0 2,1 0,-1 -2,-2 or -1,0.
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1
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1, 8, 108, 788, 21466, 142352, 2870927, 30309632, 463508815, 5517128232, 80746395988, 996650042932, 14098841570856, 180039273539208, 2481030453759277, 32286677930222166, 438951446059251344
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