a(n) is the number of digits in the decimal expansion of Pi needed to contain a repeated n-digit substring.
A159345
a(n) is the number of digits in the decimal expansion of Pi needed to contain a repeated n-digit substring.
Terms
- a(0) =3a(1) =22a(2) =63a(3) =135a(4) =555a(5) =1301a(6) =4607a(7) =15441a(8) =33852a(9) =240488a(10) =694409a(11) =857993a(12) =5563724a(13) =9289707a(14) =28048931a(15) =129440103a(16) =262527982a(17) =1982424660a(18) =8858170624a(19) =17601613331
External references
- oeis: A159345