A145712 Number of primes p in the range 9 < p <= prime(10^n) that have most significant and least significant decimal digit both equal to 9.
0, 0, 2, 245, 2053, 17518, 153645, 1362970, 12244431, 111153241
Offset: 1
Examples
a(3)=2 because out of the first 1000 primes, only two have first and last digits 9, 919 and 929.
Extensions
Better definition from R. J. Mathar, Aug 04 2010
Edited and corrected by N. J. A. Sloane, Aug 16 2010
a(7)-a(10) from D. S. McNeil, Aug 29 2010