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 A064841 Working in base 2, replace n with the concatenation of its prime divisors in increasing order. 3
 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 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

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Last modified October 23 18:36 EDT 2018. Contains 316529 sequences. (Running on oeis4.)