Total number of positive integers below 10^n with 4 positive squares in their representation as sum of squares.
A167615
Total number of positive integers below 10^n with 4 positive squares in their representation as sum of squares.
Terms
- a(0) =1a(1) =15a(2) =165a(3) =1665a(4) =16664a(5) =166664a(6) =1666663a(7) =16666663a(8) =166666661a(9) =1666666662a(10) =16666666661a(11) =166666666660
External references
- oeis: A167615