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A051698
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Closest prime to n that is different from n (break ties by taking the smaller prime).
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0
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2, 2, 3, 2, 3, 3, 5, 5, 7, 7, 11, 13, 11, 11, 13, 13, 17, 19, 17, 17, 19, 19, 23, 19, 23, 23, 23, 29, 29, 31, 29, 29, 31, 31, 31, 37, 37, 41, 37, 37, 41, 43, 41, 41, 43, 43, 47, 43, 47, 47, 47, 53, 53, 47, 53, 53, 53, 59, 59, 61, 59, 59, 61, 61, 61, 67, 67, 71, 67, 67, 71, 73
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,1
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EXAMPLE
| Closest primes to 0,1,2,3,4 are 2,2,3,2,3.
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CROSSREFS
| Related sequences: A023186-A023188, A046929-A046931, A051650, A051652, A051697-A051702, A051728-A051730.
Sequence in context: A057334 A048475 A204597 * A046773 A175402 A101037
Adjacent sequences: A051695 A051696 A051697 * A051699 A051700 A051701
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KEYWORD
| nonn,easy
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com).
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EXTENSIONS
| More terms from James A. Sellers (sellersj(AT)math.psu.edu)
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