943041domain: NAppears in sequencesOctagonal numbers for which both the sum and the product of the digits is also an octagonal number.at n=26A117084Octagonal numbers of the form C*(3C - 2) with 3C - 2 = k^2 and C a composite number.at n=19A125511Crystal ball sequence for the lattice C_4.at n=20A142993