Numbers k not divisible by 10 such that k^2 and 2*k are in A046030.
A308961
Numbers k not divisible by 10 such that k^2 and 2*k are in A046030.
Terms
- a(0) =2a(1) =7a(2) =97a(3) =997a(4) =9997a(5) =20247a(6) =99997a(7) =999997a(8) =9999997a(9) =99999997a(10) =999999997a(11) =2224745247a(12) =9999999997a(13) =99999999997a(14) =999999999997
External references
- oeis: A308961