Bases for the cubes arising in A083203.

Terms

a(0) =2a(1) =4a(2) =7a(3) =11a(4) =16a(5) =22a(6) =9a(7) =17a(8) =289a(9) =1873a(10) =11553a(11) =63553a(12) =4573699a(13) =14073021495