a(n) = a(n-1) + a(n-2)^3.A000280a(n) = a(n-1) + a(n-2)^3.Terms a(0) =0a(1) =1a(2) =1a(3) =2a(4) =3a(5) =11a(6) =38a(7) =1369a(8) =56241a(9) =2565782650External referencesoeis: A000280