470184984577domain: NAppears in sequencesa(n) = 6^n + 1.at n=15A062394Sums of two coprime positive cubes that are also sums of two coprime positive fifth powers.at n=11A228556a(n) = 6^n-(-1)^n.at n=15A274073a(n) = Sum_{d|n} phi(d)^(n+d+1).at n=6A342618