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A127426
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n!-ceiling(n^(n/2)).
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2
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0, 0, 0, 0, 8, 64, 504, 4132, 36224, 343197, 3528800, 39382654, 476015616, 6209617492, 87072877696, 1307012632486, 20918494920704, 355658666311252, 6402175346437632, 121643693845767057, 2432891768176640000, 51090865734892274539, 1124000143459306268672
(list; graph; refs; listen; history; internal format)
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