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A282973 Primes in A011546. 2
3, 31, 314159, 314159265359 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..4.

Eric Weisstein's World of Mathematics, Pi-Prime

EXAMPLE

a(5) = A011546(1902) = 314159...066118631 is a prime with 1902-digit.

a(6) = A011546(3971) = 314159...411010447.

a(7) = A011546(5827) = 314159...690496521.

a(8) = A011546(16208) = A005042(5) = 314159....943936307.

For n<=17511, there are eight primes in sequence A011546(n).

In addition, because of round(Pi*10^47576) = floor(Pi*10^47576), and A011546(47577)(=A005042(6)) is a prime. Thus,  A011546(47577) will appear in here. A011546(613373)(=A005042(8)) as well. But A011546(78073)(=A005042(7)+1) is not prime.

MATHEMATICA

Do[If[PrimeQ[Round[Pi*10^(n-1)]], Print[Round[Pi*10^(n-1)]]], {n, 17511}]

CROSSREFS

Cf. A011546, A282974, A000796, A005042.

Sequence in context: A276199 A118913 A297480 * A005042 A317482 A136582

Adjacent sequences:  A282970 A282971 A282972 * A282974 A282975 A282976

KEYWORD

nonn,base

AUTHOR

XU Pingya, Feb 25 2017

STATUS

approved

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Last modified October 21 12:36 EDT 2018. Contains 316419 sequences. (Running on oeis4.)