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Search: id:A056208
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| 5, 7, 11, 19, 37, 67, 131, 263, 523, 1031, 2053, 4099, 8209, 16421, 32771, 65539, 131101, 262147, 524341, 1048583, 2097169, 4194371, 8388619, 16777259, 33554473, 67108961, 134217757, 268435459, 536870923, 1073741827, 2147483659
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OFFSET
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1,1
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EXAMPLE
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n=13, 2^13+p=8192+p is not prime for p=2,3,5,7,11,13. At first, for p=17, 8209 is prime; Primes obtained also for many larger p, the next is 8221. So a(13)=8209, the smallest one.
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CROSSREFS
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Sequence in context: A019376 A159080 A038881 this_sequence A045441 A128841 A057733
Adjacent sequences: A056205 A056206 A056207 this_sequence A056209 A056210 A056211
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KEYWORD
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nonn
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AUTHOR
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Labos E. (labos(AT)ana.sote.hu), Oct 06 2000
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