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A128193
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First differences of values of n for Cullen primes in A005849.
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1
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140, 4572, 1082, 816, 11885, 13796, 177, 27187, 31169, 171594, 98856, 120624, 872929
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,1
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COMMENTS
| Carlos Rivera's Problem 50 is devoted to this topic. If we pair differences according to magnitude, we first obtain 177-140=37 a prime. This raises the question as to whether there are other such prime values.
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FORMULA
| Find the difference of consecutive overlapping pairs of values of n
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EXAMPLE
| a(0)=140 because the first pair of n are 1 and 141. 141-1=140.
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CROSSREFS
| Cf. A005849 A128194.
Sequence in context: A133711 A184377 A199831 * A061607 A202786 A035820
Adjacent sequences: A128190 A128191 A128192 * A128194 A128195 A128196
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KEYWORD
| easy,nonn
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AUTHOR
| Enoch Haga (Enokh(AT)comcast.net), Feb 18 2007
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