6671808000domain: NAppears in sequencesa(n) = n^2*(n+1)!/(n^tau(n)) where tau(n) is the number of divisors of n.at n=13A069141Denominator of Laguerre(n, -7).at n=15A160606T(m,n) is the number of linear extensions of n fork-join DAGs of width m, read by downward antidiagonals.at n=42A357297