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Search: id:A140121
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| A140121 |
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Primes of the form prime(x)*prime(x+1) + (prime(x+1)-prime(x)). |
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+0
1
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| 7, 17, 37, 673, 1153, 4093, 7393, 8641, 22501, 32401, 57601, 64513, 70753, 72901
(list; graph; listen)
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OFFSET
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1,1
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EXAMPLE
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2*3+(3-2)=2*3+1=7, 23*29+(29-23)=23*29+6=673
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MATHEMATICA
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a = {}; Do[p1 = Prime[n]; p2 = Prime[n + 1]; p = p1*p2 + (p2 - p1); p3 = p2 - p1; If[PrimeQ[p], AppendTo[a, p]], {n, 10^2}]; a
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CROSSREFS
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Sequence in context: A030432 A090147 A155007 this_sequence A102770 A058273 A058274
Adjacent sequences: A140118 A140119 A140120 this_sequence A140122 A140123 A140124
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KEYWORD
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nonn
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AUTHOR
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Vladimir Orlovsky (4vladimir(AT)gmail.com), Jun 21 2008
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