21492496domain: NAppears in sequencesNumber of 6 X n 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 0 1 and 0 1 1 vertically.at n=8A208558Primitive coreful weird numbers: powerful numbers k that are coreful abundant (A308053) but no subset of their aliquot coreful divisors sums to k.at n=5A391142