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A000475 Rencontres numbers: permutations with exactly 4 fixed points.
(Formerly M4969 N2132) 		+0
10
1, 0, 15, 70, 630, 5544, 55650, 611820, 7342335, 95449640, 1336295961, 20044438050, 320711010620, 5452087178160, 98137569209940, 1864613814984984, 37292276299704525, 783137802293789040, 17229031650463366195, 396267727960657413630 (list; graph; listen)
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Last modified December 7 08:40 EST 2009. Contains 170430 sequences.

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