160132domain: NAppears in sequencesa(1)=1; for n > 1, a(n) = 7*a(n-1) + n.at n=6A014830a(n) = Sum_{i=1..n} i*n^(n-i).at n=7A062805Numbers that can be written as the average of two positive cubes in more than one way.at n=12A322102