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A083808
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Smallest prime == 1 (mod n-th unary number U(n) = (10^n-1)/9).
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0
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2, 23, 223, 24443, 199999, 666667, 19999999, 22222223, 666666667, 44444444441, 22222222223, 2444444444443, 17777777777777, 88888888888889, 1333333333333333, 64444444444444439, 88888888888888889
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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EXAMPLE
| a(4) = 24443 ==1 (mod 1111).
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MAPLE
| with(numtheory): for n from 1 to 30 do u := (10^n-1)/9: for j from u+1 to 1000*u+1 by u do if isprime(j) then printf(`%d, `, j); break; fi: od:od:
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CROSSREFS
| Cf. A000042.
Sequence in context: A069629 A069614 A036937 * A037750 A037631 A026075
Adjacent sequences: A083805 A083806 A083807 * A083809 A083810 A083811
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KEYWORD
| base,nonn
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AUTHOR
| Amarnath Murthy and Meenakshi Srikanth (amarnath_murthy(AT)yahoo.com), May 08 2003
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EXTENSIONS
| Corrected and extended by James A. Sellers (sellersj(AT)math.psu.edu), May 19, 2003
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