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A228507 Numbers n such that first n digits of A091723 (Decimal expansion of the root x of ExpIntegralEi[x]==0) gives a prime number. 0
1, 2, 145, 180, 691, 4123 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

a(7) > 10^4.

LINKS

Table of n, a(n) for n=1..6.

Eric Weisstein's World of Mathematics, Constant Primes

Eric Weisstein's World of Mathematics, Integer Sequence Primes

CROSSREFS

Cf. A091723.

Sequence in context: A074319 A188284 A306955 * A254499 A071064 A265442

Adjacent sequences:  A228504 A228505 A228506 * A228508 A228509 A228510

KEYWORD

nonn,more,less,base

AUTHOR

Robert Price, Aug 23 2013

STATUS

approved

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Last modified January 28 06:00 EST 2021. Contains 340490 sequences. (Running on oeis4.)