A064795 Home primes in base 2: primes reached when you start with n and (working in base 2) concatenate its prime factors (A048985); repeat until a prime is reached (or -1 if no prime is ever reached).

1, 10, 11, 11111, 101, 1011, 111, 10110011, 11101, 11111, 1011, 101011, 1101, 10111, 11101, 10111011100111, 10001, 101111, 10011, 11111011, 11111, 101011, 10111, 111110011, 111111111011, 111111111011, 1111111, 111111111011, 11101

Offset

1,2

Comments

a(1) = 1 by convention.

Links

Table of n, a(n) for n=1..29.

P. De Geest, Home Primes

Crossrefs

See A048986 for base 10 representation. Cf. A037274.

Sequence in context: A279598 A280138 A287875 * A273463 A283430 A278856

Adjacent sequences: A064792 A064793 A064794 * A064796 A064797 A064798

Keyword

nonn,base,easy,changed

Author

N. J. A. Sloane, Oct 31 2001

Extensions

More terms from David Wasserman, Aug 15 2002

Status

approved