OFFSET
1,1
COMMENTS
x belongs to this sequence if and only if the primality character of (100 * (x-1)) + k is the same as (100 * x) + k for all k = 0..99.
FORMULA
a(n) ~ n. In particular there are x - 200x/log x + O(x/log^2 x) members of this sequence below x. - Charles R Greathouse IV, Dec 09 2012
a(n) = A190639(n) + 1.
CROSSREFS
KEYWORD
nonn,base
AUTHOR
V. Raman, Dec 08 2012
STATUS
approved