Number of distinct quadratic residues mod 10^n; also number of distinct n-digit endings of base-10 squares.
A000993
Number of distinct quadratic residues mod 10^n; also number of distinct n-digit endings of base-10 squares.
Terms
- a(0) =1a(1) =6a(2) =22a(3) =159a(4) =1044a(5) =9121a(6) =78132a(7) =748719a(8) =7161484a(9) =70800861a(10) =699869892a(11) =6978353179a(12) =69580078524a(13) =695292156201
External references
- oeis: A000993