925680domain: NAppears in sequencesNumbers that can be expressed as the difference of the squares of primes in exactly thirteen distinct ways.at n=10A092009Numbers with prime factorization pqrstu^4.at n=29A190388E.g.f. A(x) satisfies A(x) = 1 + (1/x) * (exp(x^2*A(x)) - 1).at n=8A392953