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A272304 Position of the first n-digit prime occuring in the decimal expansion of e. 2
1, 2, 1, 15, 25, 13, 1, 65, 20, 100, 38, 54, 8, 48, 40, 41, 9, 83, 152, 19, 52, 6, 16, 66, 4, 4, 69, 25, 28, 7, 97, 174, 4, 48, 127, 11, 40, 58, 48, 69, 45, 40, 34, 119, 6, 7, 92, 61, 2, 40, 138, 105, 332, 28, 70, 322, 62, 231, 78, 339, 245, 66, 49, 439, 298 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Leading zeros are not allowed.

LINKS

Harvey P. Dale, Table of n, a(n) for n = 1..200

EXAMPLE

a(1) = 1 because the initial digit "2" of e is prime.

MATHEMATICA

With[{ed = RealDigits[E, 10, 10000][[1]]}, Table[Position[Partition[ed, n, 1], _?(PrimeQ[FromDigits[#]] && #[[1]] != 0 &), {1}, 1, Heads -> False], {n, 100}]] // Flatten

CROSSREFS

Cf. A001113, A198344.

Sequence in context: A181869 A141510 A219899 * A266521 A039652 A012894

Adjacent sequences:  A272301 A272302 A272303 * A272305 A272306 A272307

KEYWORD

nonn,base

AUTHOR

Harvey P. Dale, Apr 25 2016

STATUS

approved

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Last modified April 26 11:46 EDT 2019. Contains 322472 sequences. (Running on oeis4.)