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Search: id:A024426
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| A024426 |
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a(n) = [ (1/n)*(S(n,1) + S(n,2) + ... + S(n,n)) ], where S(i,j) are Stirling numbers of second kind. |
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| 1, 1, 1, 3, 10, 31, 122, 480, 2294, 10929, 60498, 335876, 2095623, 13210136, 91247019, 640907585, 4840330498, 37349712867, 305585514757, 2562264748985, 22547698549102, 203661390447730
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