Numbers k such that 7*(10^k - 1)/9 - 5*10^floor(k/2) is a palindromic wing prime (a.k.a. near-repdigit palindromic prime).
A077777
Numbers k such that 7*(10^k - 1)/9 - 5*10^floor(k/2) is a palindromic wing prime (a.k.a. near-repdigit palindromic prime).
Terms
- a(0) =3a(1) =7a(2) =15a(3) =21a(4) =25a(5) =961a(6) =1899a(7) =3891a(8) =15097a(9) =17847
External references
- oeis: A077777