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bar zvahf qrenatrzragf bire crezhgngvbaf

frr uggcf//ra.jvxvcrqvn.bet/jvxv/Qrenatrzrag#Yvzvg_bs_engvb_bs_qrenatrzrag_gb_crezhgngvba_nf_a_nccebnpurf_.R2.88.9R



ROT13ed and fixed the link:

one minus derangements over permutations

see

https://en.wikipedia.org/wiki/Derangement#Limit_of_ratio_of_...




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