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A046550
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First numerator and then denominator of the elements to the right of the central elements of the 1/3-Pascal triangle (by row), excluding 3's.
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0
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1, 1, 1, 1, 4, 1, 1, 7, 1, 1, 5, 1, 10, 1, 1, 25, 13, 1, 1, 55, 38, 16, 1, 1, 93, 18, 1, 19, 1, 1, 203, 147, 73, 22, 1, 1, 350, 220, 95, 25, 1, 1
(list; table; graph; refs; listen; history; internal format)
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