Number of cubic residues mod 6^n.

Terms

a(0) =1a(1) =6a(2) =9a(3) =35a(4) =210a(5) =1083a(6) =6253a(7) =37518a(8) =222705a(9) =1331099a(10) =7986594a(11) =47871651a(12) =287102581a(13) =1722615486a(14) =10334532969a(15) =62003849075a(16) =372023094450