Number of distinct quadratic residues mod 9^n.
A039306
Number of distinct quadratic residues mod 9^n.
Terms
- a(0) =1a(1) =4a(2) =31a(3) =274a(4) =2461a(5) =22144a(6) =199291a(7) =1793614a(8) =16142521a(9) =145282684a(10) =1307544151a(11) =11767897354a(12) =105911076181a(13) =953199685624
External references
- oeis: A039306