A094875 a(n)=1 if floor(Pi*10^n) is prime, otherwise a(n)=0.

1, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0

Offset: 0

Author

Frederic E.D. Michaud (famillesmichaud(AT)hotmail.com), Jun 16 2004

Keywords

• nonn

Examples

			a(0)=1 because 3 is prime,
a(2)=0 because 314 is divided by 2
a(5)=1 because 314159 is prime
a(13)=0 because 31415926535897 is divided by 163
		

Crossrefs

Cf. A089281, A000796, A010051.

Programs

PARI

\p 120 a=vector(100);v=1;for(i=1,100,a[i]=isprime(floor(Pi*v));v=v*10)

Extensions

More terms from Johan Claes, Jun 16 2004