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A102816
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Numbers n such that n111111111 is prime.
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0
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14, 17, 31, 35, 40, 53, 58, 73, 77, 94, 95, 101, 109, 116, 142, 149, 164, 196, 218, 226, 227, 233, 236, 253, 256, 257, 266, 268, 281, 295, 302, 311, 340, 341, 355, 359, 374, 385, 415, 418, 421, 428, 442, 443, 466, 469, 491, 542, 563, 571, 583, 599, 604, 614, 632, 656, 665, 667, 668
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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EXAMPLE
| If n=14, then n111111111 = 14111111111 (prime).
If n=73, then n111111111 = 73111111111 (prime).
If n=142, then n111111111 = 142111111111 (prime).
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PROG
| (MAGMA) [ n: n in [1..700] | IsPrime(Seqint([1, 1, 1, 1, 1, 1, 1, 1, 1] cat Intseq(n))) ]; // From Vincenzo Librandi, Feb 03 2011
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CROSSREFS
| Sequence in context: A054296 A155704 A105189 * A165719 A154146 A113735
Adjacent sequences: A102813 A102814 A102815 * A102817 A102818 A102819
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KEYWORD
| base,nonn
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AUTHOR
| Parthasarathy Nambi (PachaNambi(AT)yahoo.com), Feb 26 2005
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