311834363841domain: NAppears in sequencesa(0)=1; a(n) is the smallest positive integer such that lcm(a(n-1), a(n)) = n!.at n=21A129108Denominator of Laguerre(n, -10).at n=21A160589a(n) = numerators of n!/10^n.at n=21A240533Denominator of the coefficients in the expansion of 1/W(x) - 1/x where W(x) is the Lambert W function.at n=20A264235