

A282974


Numbers n such that A011546(n) is a prime.


1




OFFSET

1,2


COMMENTS

Round(k)=floor(k) or floor(k)+1, so if round(k)=floor(k) and floor(k) is a prime number, then round(k) is also prime. Thus 47577 = A005042(6) and 613373 = A005042(8) are also terms.
The corresponding primes are in A282973.


LINKS

Table of n, a(n) for n=1..7.
Eric Weisstein's World of Mathematics, PiPrime


MATHEMATICA

Do[If[PrimeQ[Round[Pi*10^(n1)]], Print[n], {n, 17511}]


CROSSREFS

Cf. A000796, A005042, A011546, A282973.
Sequence in context: A126293 A007668 A089415 * A181063 A161324 A226603
Adjacent sequences: A282971 A282972 A282973 * A282975 A282976 A282977


KEYWORD

nonn,base,more


AUTHOR

XU Pingya, Feb 25 2017


STATUS

approved



