A163825 Number of primes p with 2^n <= p < 3^n.

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

Offset

1,2

Links

Table of n, a(n) for n=1..27.

Crossrefs

See A076958 for another version. [From R. J. Mathar, 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, Aug 04 2009

Extensions

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

Status

approved