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A231060
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Number of nX5 0..3 arrays x(i,j) with each element horizontally or vertically next to at least one element with value (x(i,j)+1) mod 4, no adjacent elements equal, and upper left element zero
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1
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0, 68, 1272, 27346, 585880, 12582344, 270096962, 5799242344, 124514793312, 2673473185328, 57402651030122, 1232504863875396, 26463395615097866, 568201785697961358, 12199995225532283910, 261948999886945680148
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