2290792933

Appears in sequences

• Rencontres numbers: number of permutations of [n] with exactly one fixed point.at n=12A000240
• a(n) = ceiling(n!/e) with e = A001113 = exp(1).at n=13A174318
• a(n) = A000166(floor(n/2)) if n is even otherwise A000240(floor((n + 1)/2)).at n=25A371998