A090201 a(n) = p-th digit of Pi where p = n-th prime.
1, 4, 5, 2, 5, 9, 2, 8, 6, 2, 9, 4, 1, 9, 3, 8, 9, 4, 7, 4, 6, 8, 6, 8, 7, 9, 2, 0, 6, 2, 4, 5, 2, 1, 1, 8, 7, 4, 7, 5, 5, 9, 9, 4, 3, 1, 5, 8, 6, 8, 7, 1, 5, 1, 5, 4, 6, 0, 6, 2, 3, 2, 7, 6, 6, 5, 0, 9, 3, 4, 8, 3, 0, 8, 6, 3, 9, 1, 4, 0, 9, 3, 3, 1, 1, 1, 5, 2, 9, 2, 5, 7, 7, 1, 9, 8, 3, 0, 6, 7, 2, 7, 5, 1, 6
Offset: 2
Examples
The 5th prime is 11. The 11th digit of pi is 5, the 5th term in the sequence.
Programs
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Mathematica
With[{nn=600},Pick[RealDigits[Pi,10,nn][[1]],If[PrimeQ[#],1,0]&/@ Range[nn],1]] (* Harvey P. Dale, Apr 22 2012 *) -
PARI
\primeth.gp primeth(n) = { default(realprecision,1000); p=Str(Pi*10^999); default(realprecision,28); forprime(x=2,n, print1(mid(p,x,1)",") ) } mid(str,s,n) = { v =""; tmp = Vec(str); ln=length(tmp); for(x=s,s+n-1, v=concat(v,tmp[x]); ); return(v) }
Comments