A064795 - OEIS

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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).

0

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

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

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

AUTHOR

N. J. A. Sloane, Oct 31 2001

EXTENSIONS

More terms from David Wasserman, Aug 15 2002

STATUS

approved