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A180589
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a(n)=floor(n!*h(n)/n), where h(n)=sum(1/k,k=1..10)
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0
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1, 1, 3, 12, 54, 294, 1866, 13698, 114064, 1062864, 10958530, 123870240, 1523289156, 20247546240, 289277533440, 4420892649600, 71965034739952, 1243166003251200, 22713955095665178, 437647401838080000
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