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A174774
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Sum of the numerators for computing the third moment of the probability mass function for probability of k pairs among the involutions on n elements (A000085) assuming equal likelihood.
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0
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0, 1, 3, 30, 130, 780, 3696, 19768, 97560, 510660, 2603260, 13754136, 72333768, 390339040, 2116922640, 11722194240, 65521880896, 372897624528, 2146502657520, 12558129505120, 74371827119520, 447090649997376
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