Number of odd Ulam numbers <= 10^n.

A382860

Number of odd Ulam numbers <= 10^n.

Terms

    a(0) =2a(1) =12a(2) =60a(3) =398a(4) =3780a(5) =36868a(6) =368904a(7) =3696883a(8) =36977302a(9) =369860633

External references