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Search: id:A128193
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| A128193 |
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First differences of values of n for Cullen primes in A005849. |
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+0
2
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| 140, 4572, 1082, 816, 11885, 13796, 177, 27187, 31169, 171594, 98856, 120624, 872929
(list; graph; listen)
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OFFSET
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0,1
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COMMENT
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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
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Find the difference of consecutive overlapping pairs of values of n
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EXAMPLE
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a(0)=140 because the first pair of n are 1 and 141. 141-1=140.
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CROSSREFS
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Cf. A005849 A128194.
Sequence in context: A140798 A010080 A133711 this_sequence A061607 A035820 A075915
Adjacent sequences: A128190 A128191 A128192 this_sequence A128194 A128195 A128196
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KEYWORD
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easy,nonn
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AUTHOR
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Enoch Haga (Enokh(AT)comcast.net), Feb 18 2007
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