A064841 Working in base 2, replace n with the concatenation of its prime divisors in increasing order.

1, 10, 11, 1010, 101, 1011, 111, 101010, 1111, 10101, 1011, 101011, 1101, 10111, 11101, 10101010, 10001, 101111, 10011, 1010101, 11111, 101011, 10111, 10101011, 101101, 101101, 111111, 1010111, 11101, 1011101, 11111, 1010101010, 111011

Offset: 1

Author

N. J. A. Sloane, Oct 31 2001

Keywords

• nonn
• easy
• base

Examples

			15 = 3*5 -> 11*101 -> 11101, so a(15) = 11101.
		

Links

• P. De Geest, Home Primes

Crossrefs

See A048985 for same terms written in base 10.

Extensions

More terms from Larry Reeves (larryr(AT)acm.org) and Robert G. Wilson v, Nov 01 2001