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A284713
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Number of indecomposable permutations avoiding the pattern 4231.
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1
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1, 1, 3, 12, 56, 289, 1604, 9415, 57801, 368269, 2421115, 16352401, 113075441, 798316997, 5741446395, 41984708298, 311673028845, 2345644392051, 17876342623580, 137820598360123, 1073961913716521, 8452182814380104, 67136452766364121, 537890721293399309
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OFFSET
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1,3
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LINKS
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FORMULA
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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