A161793 If b(n) is the number of 0's in the binary representation of n, then the positive integer n is included if n = k^b(n), for some k = integer.

1, 2, 4, 5, 6, 8, 9, 11, 13, 14, 16, 23, 25, 27, 29, 30, 32, 47, 55, 59, 61, 62, 64, 81, 95, 111, 119, 121, 123, 125, 126, 128, 191, 223, 239, 247, 251, 253, 254, 256, 343, 383, 447, 479, 495, 503, 507, 509, 510, 512, 767, 895, 959, 991, 1007, 1015, 1019, 1021

Offset

1,2

Links

Table of n, a(n) for n=1..58.

Example

25 in binary is 11001, which has two 0's. Since 25 = 5^2, with an exponent of 2, then 25 is included in this sequence.

Crossrefs

A161792

Sequence in context: A004059 A189404 A316681 * A270970 A188092 A188080

Adjacent sequences: A161790 A161791 A161792 * A161794 A161795 A161796

Keyword

base,nonn

Author

Leroy Quet, Jun 19 2009

Extensions

More terms from Sean A. Irvine, Mar 14 2010

Status

approved