OFFSET
1,1
COMMENTS
There are 11555200 possible prime patterns for centuries having 9 primes. - Tim Johannes Ohrtmann, Aug 27 2015
LINKS
T. D. Noe, Table of n, a(n) for n = 1..1000
EXAMPLE
41 is in this sequence because there are 9 primes between 4100 and 4199 (4111, 4127, 4129, 4133, 4139, 4153, 4157, 4159 and 4177).
MATHEMATICA
Select[Range[350], PrimePi[100#+99]-PrimePi[100#]==9&] (* Harvey P. Dale, Sep 05 2023 *)
PROG
(PARI) for(n=1, 1e6, if(sum(k=100*n, 100*(n+1), ispseudoprime(k))==9, print1(n", "))); \\ Charles R Greathouse IV, Feb 21 2011
(PARI) N=100; s=0; forprime(p=2, 1e6, if(p>N, if(s==9, print1((N\100)-1, ", ")); s=1; N=100*(p\100+1), s++)) \\ Charles R Greathouse IV, Feb 21 2011
CROSSREFS
KEYWORD
nonn
AUTHOR
Tim Johannes Ohrtmann, Feb 20 2011
STATUS
approved