342096domain: NAppears in sequencesNumbers k such that k^2 XOR (k+1)^2 is a square, and k^2 XOR (k+2)^2 is also a square, where XOR is the bitwise logical exclusive-or operator.at n=3A224241G.f.: Product_{k>=1} 1/(1-x^k)^(3*k+1).at n=12A255271