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

Author

Marc LeBrun, Feb 07 2001

Keywords

• base
• easy
• nonn

Comments

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

Examples

			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.
		

Links

• Index entries for sequences that are permutations of the natural numbers

Crossrefs

Cf. A059884, A052330.