OFFSET
1,1
COMMENTS
a(11) > 40000. - Robert G. Wilson v, Aug 19 2004
EXAMPLE
n=3, '314': 11^18 = 5559917313492231481, therefore a(3)=18: floor(11^a(3) / 100) mod 1000 = 314.
MATHEMATICA
f[0] = 1; f[n_] := f[n] = Block[{pi = StringTake[ ToString[ RealDigits[Pi, 10, n][[1]]], {2, -2}], k = f[n - 1]}, While[ StringPosition[ ToString[ IntegerDigits[11^k]], pi] == {}, k++ ]; k]; (* Robert G. Wilson v, Aug 19 2004 *)
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Reinhard Zumkeller, Aug 18 2004
EXTENSIONS
a(9)-a(10) from Robert G. Wilson v, Aug 19 2004
STATUS
approved