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A096835
Number of primes in the neighborhood of 3^n with radius ceiling(log(3^n)).
0
3, 2, 3, 2, 2, 2, 1, 3, 2, 2, 0, 0, 1, 3, 3, 0, 2, 2, 2, 3, 2, 4, 1, 3, 3, 2, 3, 2, 1, 2, 2, 1, 0, 1, 2, 5, 2, 3, 0, 2, 4, 1, 0, 3, 3, 2, 2, 1, 3, 3, 2, 1, 2, 3, 2, 2, 5, 0, 3, 2, 2, 3, 4, 0, 1, 3, 0, 1, 4, 0, 2, 1, 1, 2, 3, 2, 3, 1, 2, 3, 3, 0, 0, 1, 2, 2, 2, 2, 2, 2, 5, 3, 0, 1, 6, 1, 4, 5, 1, 2, 3, 2, 1, 1, 2
OFFSET
1,1
FORMULA
a(n) equals almost A096509(3^n) >= a(n) because here only primes are counted, the true prime powers not.
CROSSREFS
KEYWORD
nonn
AUTHOR
Labos Elemer, Jul 14 2004
STATUS
approved