368794domain: NAppears in sequencesTriangle read by rows, T(n,k) = !n + (k-1)*(n-1)!, with n>=1, 1<=k<=n; Position of the first n-letter permutation beginning with number k in the list of lexicographically sorted permutations A030299.at n=44A237450Number of primes less than 10^n with digits in nondecreasing order.at n=19A345325