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A101031
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Triangle read by rows: T(n,k) = (1/k) times the number of functions from an n-element set into but not onto a k-element set.
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0
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0, 0, 1, 0, 1, 7, 0, 1, 15, 58, 0, 1, 31, 196, 601, 0, 1, 63, 634, 2765, 7656, 0, 1, 127, 1996, 12265, 44136, 116929, 0, 1, 255, 6178, 52925, 248016, 803383, 2092112, 0, 1, 511, 18916, 223801, 1362096, 5432161, 16595776, 43006401, 0, 1, 1023, 57514, 932525
(list; table; graph; refs; listen; history; internal format)
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