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A195138 First digit to appear n times in the decimal expansion of e. 9
2, 2, 8, 8, 2, 2, 2, 2, 9, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 3, 9, 9, 2, 7, 4, 4, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Alois P. Heinz, Table of n, a(n) for n = 1..10000

EXAMPLE

From Michael De Vlieger, Sep 10 2017: (Start)

a(n) is the first decimal digit of e that first appears n times when e is expanded to the -m place:

   n  a(n)  m

   1   2    0

   2   2    4

   3   8    7

   4   8    9

   5   2   22

   6   2   30

   7   2   33

   8   2   40

   9   9   58

  10   7   63

  11   7   64

  12   7   68

  13   7   78

  14   7   83

  15   7   89

  16   7   99

(End)

MATHEMATICA

With[{e = First@ RealDigits[N[E, 10^4]]}, Function[t, -1 + Map[FirstPosition[t, #] &, Range@ Max@ t][[All, -1]]]@ Table[BinCounts[Take[e, n], {0, 10, 1}], {n, 10^3}]] (* Michael De Vlieger, Sep 10 2017 *)

CROSSREFS

Cf. A001113, A096567, A195139, A195141, A277270, A280811, A290643, A290644.

Sequence in context: A095297 A269545 A258983 * A094887 A021441 A196066

Adjacent sequences:  A195135 A195136 A195137 * A195139 A195140 A195141

KEYWORD

nonn,base

AUTHOR

Omar E. Pol, Oct 22 2011

EXTENSIONS

More terms from D. S. McNeil, Oct 22 2011

STATUS

approved

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Last modified April 19 04:19 EDT 2019. Contains 322237 sequences. (Running on oeis4.)