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A088073 Beginning with 11 (concatenation of 1 twice), smallest number which is a concatenation of itself as many (say k) times required, chosen from odd numbers not == 5 (mod 10), in natural order, so that every partial concatenation is prime. 1
11, 3, 777, 999, 11, 131313131313131313131313131313131313131313 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,1
COMMENTS
Numbers chosen are from 1,3,7,9,11,13,17,19,21,23,27,29,... which can produce primes.
Next term has > 2000 digits and is too large to include. - David Wasserman, Jul 01 2005
LINKS
CROSSREFS
Cf. A088074.
Sequence in context: A069869 A079841 A110782 * A352162 A010187 A248175
KEYWORD
base,nonn
AUTHOR
Amarnath Murthy, Sep 22 2003
EXTENSIONS
More terms from David Wasserman, Jul 01 2005
STATUS
approved

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Last modified March 29 05:48 EDT 2024. Contains 371265 sequences. (Running on oeis4.)