A244602 First repdigit number with n digits occurring in the decimal expansion of e, starting after the decimal point.

7, 66, 999, 8888, 66666, 0, 5555555, 99999999, 111111111, 1111111111

Offset

1,1

Comments

A244601 allows consecutive 0's and says "Resulting repdigits are A244602", so 000000 = 0 is apparently allowed here as a repdigit with 6 digits. Otherwise a(6) would be 555555 at position 210482 (which extends to a seventh 5). - Jens Kruse Andersen, Jul 20 2014

Links

Table of n, a(n) for n=1..10.

e digit search engine

Example

Decimal expansion of e:
2.|7|18281828459045235360287471352|66|24977572470936|999|59574966967627724..

Mathematica

e = Rest[First[RealDigits[E, 10, 2000000]]];
A244602 = ConstantArray[0, 8];
For[i = 1, i <= Length[e], i++,
t = e[[i]]; c = 1;
While[e[[i + c]] == t, c++];
If[A244602[[c]] == 0,
  A244602[[c]] = FromDigits[ConstantArray[t, c]]; i = i + c - 1;
  Continue[]]
]; A244602 (* Robert Price, Sep 07 2019 *)
With[{edg=Rest[RealDigits[E, 10, 10^6][[1]]]}, Table[FromDigits[SequenceCases[ edg, PadRight[ {}, n, x_], 1][[1]]], {n, 7}]] (* The program generates the first seven terms of the sequence. *) (* Harvey P. Dale, Aug 13 2022 *)

Crossrefs

Cf. A010785, A244601.

Sequence in context: A024395 A215077 A003286 * A223889 A197744 A052351

Adjacent sequences: A244599 A244600 A244601 * A244603 A244604 A244605

Keyword

nonn,base,more

Author

Felix Fröhlich, Jul 01 2014

Extensions

a(5)-a(8) from Jens Kruse Andersen, Jul 20 2014

a(9)-a(10) from Felix Fröhlich, Aug 26 2014

a(1) prepended by Alois P. Heinz, Aug 26 2014

Status

approved