Number of odd composites 1 mod 4 less than 10^n.
A093151
Number of odd composites 1 mod 4 less than 10^n.
Terms
- a(0) =1a(1) =13a(2) =169a(3) =1890a(4) =20216a(5) =210824a(6) =2167819a(7) =22119495a(8) =224576508a(9) =2272476724a(10) =22940979719a(11) =231196075659
External references
- oeis: A093151