A064841 - OEIS

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

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,2

LINKS

Table of n, a(n) for n=1..33.

P. De Geest, Home Primes

EXAMPLE

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

CROSSREFS

See A048985 for same terms written in base 10.

Sequence in context: A109280 A181756 A287874 * A286200 A286411 A288198

Adjacent sequences: A064838 A064839 A064840 * A064842 A064843 A064844

KEYWORD

nonn,easy,base

AUTHOR

N. J. A. Sloane, Oct 31 2001

EXTENSIONS

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

STATUS

approved