1047200domain: NAppears in sequencesa(n) = binomial(n+3,3)*binomial(n+8,3).at n=14A104677Nonnegative values x of solutions (x, y) to the Diophantine equation x^2+(x+343)^2 = y^2.at n=34A118611a(n) is the least integer that can be expressed as the difference of two octagonal numbers in exactly n ways.at n=20A334037