

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
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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



