104980domain: NAppears in sequencesa(n) = n^4+4 = (n^2-2*n+2)*(n^2+2*n+2) = ((n-1)^2+1)*((n+1)^2+1).at n=18A057781a(n) = 16*n^4 + 4.at n=9A222655Number of partitions p of n such that (number of parts of p) - min(p) is not a part of p.at n=46A238548