A228507 - OEIS

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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.

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`

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