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A147898
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Number of permutations of floor(i*9/5), i=0..n-1, with all sums of two and three adjacent terms respectively unique.
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0
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1, 2, 6, 24, 96, 444, 2508, 13216, 81030, 566512, 4383340, 43168552, 356745786, 3125719866, 30567653042, 349720370632
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