98325domain: NAppears in sequencesNumbers that are divisible by the squares of two distinct primes and whose arithmetic derivative (A003415) is a squarefree number of the form 4k+2.at n=31A368697a(n) = numerator(N(1/2, n, 1)) where N(a, n, x) is the n-th Nørlund polynomial.at n=11A370416