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A135433
a(n) = number of primes that are the initial prime of a twin prime pair that are > (10^n)*(10^n+1) and < (10^n)*(10^n+1)+2*(10^n)+2.
0
2, 0, 3, 16, 75, 495, 3440, 25185
OFFSET
0,1
EXAMPLE
3 and 5 are twin primes as are 5 and 7, 3 and 5 > 2 and < 6 so a(0)=2
CROSSREFS
Sequence in context: A280180 A337995 A337994 * A223706 A347034 A261162
KEYWORD
hard,nonn
AUTHOR
Pierre CAMI, Dec 13 2007
STATUS
approved