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 A104197 Largest nonnegative integer r such that Prime(n) + r and Prime(n) - r are both prime. 0
 0, 0, 2, 4, 8, 10, 14, 12, 20, 24 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,3 COMMENTS a(n) can be thought of as the radius of the largest 1-dimensional circle centered at Prime(n) and consisting entirely of primes. LINKS EXAMPLE r = 4 is the largest nonnegative integer r such that Prime(4) + 4 = 11 and Prime(4) - 4 = 3 are both prime; so a(4) = 4. CROSSREFS Sequence in context: A190751 A030232 A102024 * A189792 A189782 A047235 Adjacent sequences:  A104194 A104195 A104196 * A104198 A104199 A104200 KEYWORD easy,nonn AUTHOR Joseph L. Pe (joseph_l_pe(AT)hotmail.com), Mar 12 2005 STATUS approved

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