%I #9 Oct 15 2019 11:54:50

%S 1,1331,1003303631331,1000000003003300003006603631003303631331

%N a(n+1) is next smallest cube ending with a(n), initial term is 1.

%C a(5) contains 121 digits.

%F a(n) = A050647(n)^3.

%F a(n) = (Sum_{i=0..n-1} 10^((3^i-1)/2) )^3. - _Max Alekseyev_, Jan 07 2015

%Y Cf. A050647, A048563, A050640.

%K nonn,base

%O 1,2

%A _Patrick De Geest_, Jul 15 1999