29948domain: NAppears in sequencesLow-temperature magnetization expansion for hexagonal lattice (Potts model, q=4).at n=24A057386a(n) = a(n-1) + a(n-2) + n (mod 3), with a(1)=a(2)=1.at n=21A081410n + sigma(n) + phi(n) is a cube.at n=12A116008