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Search: id:A070220
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| A070220 |
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Primes of the form n (written in base 10) followed by n 1's. |
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+0
2
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| 11, 211, 511111, 71111111, 101111111111, 161111111111111111, 2011111111111111111111, 6511111111111111111111111111111111111111111111111111111111111111111
(list; graph; listen)
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OFFSET
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1,1
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MATHEMATICA
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Do[p = FromDigits[ Join[ IntegerDigits[n], IntegerDigits[(10^n - 1)/9]]]; If[ PrimeQ[p], Print[p]], {n, 1, 100}]
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CROSSREFS
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Cf. A068817 (for values of n).
Sequence in context: A112704 A114758 A088061 this_sequence A134069 A137464 A160074
Adjacent sequences: A070217 A070218 A070219 this_sequence A070221 A070222 A070223
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KEYWORD
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base,nonn
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AUTHOR
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Amarnath Murthy (amarnath_murthy(AT)yahoo.com), May 02 2002
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EXTENSIONS
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More terms from Vladeta Jovovic (vladeta(AT)eunet.rs) and Robert G. Wilson v (rgwv(AT)rgwv.com), May 03 2002
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