a(n) is the number of positive integers <= 10^n that can be expressed as a sum of two squares.
A164775
a(n) is the number of positive integers <= 10^n that can be expressed as a sum of two squares.
Terms
- a(0) =7a(1) =43a(2) =330a(3) =2749a(4) =24028a(5) =216341a(6) =1985459a(7) =18457847a(8) =173229058a(9) =1637624156a(10) =15570512744a(11) =148736628858
External references
- oeis: A164775