72592domain: NAppears in sequencesNumber of products of factorials not exceeding n!.at n=28A101976a(1) = a(2) = a(3) = 1; for n>2, a(n+1) = a(n) + a(n-1) + a(n-2) iff a(n) is prime, otherwise a(n+1) = a(n) + 1.at n=43A113058