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A180946
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Primes p such that p(i)*p(i+1)+p(i+2)+p(i+3) is a prime.
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2
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5, 7, 11, 13, 29, 31, 37, 61, 67, 73, 89, 97, 103, 107, 139, 157, 167, 179, 181, 193, 233, 283, 349, 367, 409, 433, 569, 587, 599, 607, 619, 691, 743, 761, 769, 809, 823, 1021, 1039, 1051, 1151, 1201, 1291, 1319, 1361, 1373, 1399, 1481, 1483, 1499, 1549, 1567
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OFFSET
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1,1
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COMMENTS
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There are twin primes in the sequence: e.g (29,31); (179,181); (1481,1483).
There are consecutive primes also: e.g. (29,31,37); (1663,1667); (1777,1783).
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LINKS
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EXAMPLE
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a(5)=29 since 29*31+37+41=977 is a prime.
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MATHEMATICA
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Transpose[Select[Partition[Prime[Range[260]], 4, 1], PrimeQ[#[[1]]#[[2]]+ #[[3]]+ #[[4]]]&]][[1]] (* Harvey P. Dale, Jan 01 2012 *)
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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