A059900 Successively interleaved alternate bits in binary expansion of n gives vector of exponents in prime factorization of a(n).

1, 2, 3, 6, 4, 8, 12, 24, 5, 10, 15, 30, 20, 40, 60, 120, 16, 32, 48, 96, 64, 128, 192, 384, 80, 160, 240, 480, 320, 640, 960, 1920, 9, 18, 27, 54, 36, 72, 108, 216, 45, 90, 135, 270, 180, 360, 540, 1080, 144, 288, 432, 864, 576, 1152, 1728, 3456, 720, 1440, 2160

Offset

0,2

Comments

Every value appears once. Inverse of A059884. Similar to A052330 (they diverge at n=16) but assigns bits via interleaving versus numerical order.

Links

Table of n, a(n) for n=0..58.

Index entries for sequences that are permutations of the natural numbers

Example

To find a(7): 7 = ...000111; ... 0 0 1 1 = 3 -> 2^3 = 8; ... 0 1 = 1 -> 3^1 = 3; so a(7) = 3*8 = 24.

Crossrefs

Cf. A059884, A052330.

Sequence in context: A096112 A052330 A344535 * A123664 A084980 A101369

Adjacent sequences: A059897 A059898 A059899 * A059901 A059902 A059903

Keyword

base,easy,nonn

Author

Marc LeBrun, Feb 07 2001

Status

approved