a(n) is the number of numbers of the form k + reverse(k) for at least one number k < 10^n.
A358986
a(n) is the number of numbers of the form k + reverse(k) for at least one number k < 10^n.
Terms
- a(0) =10a(1) =28a(2) =207a(3) =548a(4) =3966a(5) =10462a(6) =75435a(7) =198890a(8) =1433489a(9) =3779246
External references
- oeis: A358986