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A010026
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Triangle read by rows: number of permutations of 1..n by length of longest run.
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0
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2, 2, 4, 2, 12, 10, 2, 16, 70, 32, 2, 20, 134, 442, 122, 2, 24, 198, 1164, 3108, 544, 2, 28, 274, 2048, 10982, 24216, 2770, 2, 32, 362, 3204, 22468, 112354, 208586, 15872, 2, 36, 462, 4720, 39420, 264538
(list; table; graph; refs; listen; history; internal format)
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