15466496domain: NAppears in sequencesa(n) = (3*n-1) * 2^(n-2).at n=19A053220Numbers with 38 divisors.at n=15A175747a(n) = Sum_{k=0..2n}(k!*(2n - k)!)/(floor(k/2)!*floor((2n - k)/2)!)^2.at n=10A327999a(n) = Sum_{k=0..n}(k!*(n - k)!)/(floor(k/2)!*floor((n - k)/2)!)^2.at n=20A328000