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A163825 Number of primes p with 2^n <= p < 3^n. 1
1, 2, 5, 16, 42, 111, 296, 793, 2130, 5796, 15788, 43370, 119711, 332449, 927748, 2600623, 7319908, 20677806, 58604898, 166595953, 474868192, 1356904893, 3885983995, 11151740822, 32062866197, 92345080709, 266390632933 (list; graph; refs; listen; history; internal format)
OFFSET

1,2

CROSSREFS

See A076958 for another version. [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Aug 05 2009]

Cf. A000244, A000079, A000720

Sequence in context: A124720 A188947 A076958 * A102866 A148368 A148369

Adjacent sequences:  A163822 A163823 A163824 * A163826 A163827 A163828

KEYWORD

easy,nonn

AUTHOR

Daniel Tisdale (daniel6874(AT)gmail.com), Aug 04 2009

EXTENSIONS

Edited by N. J. A. Sloane, Aug 07 2009

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Last modified February 16 16:51 EST 2012. Contains 205938 sequences.