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A244294
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Positive integers n such that (prime(n+i+1) - prime(n+i))/2 is prime for every i = 0, ..., 12.
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3
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56290, 110172, 127202, 377050, 469555, 775074, 929251, 2249530, 2249531, 2995058, 2995059, 4011471, 4011472, 4469958, 4778861, 4825822, 4825823, 4876245, 4881979, 4901245
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OFFSET
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1,1
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COMMENTS
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Conjecture: For any integer m > 0, there are infinitely many positive integers n such that (prime(n+i+1) - prime(n+i))/2 is prime for every i = 0, ..., m-1.
Note that for n = 10377594 all those (prime(n+i+1) - prime(n+i))/2 (i = 0, ..., 15) are prime.
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LINKS
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EXAMPLE
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a(1) = 56290 with (prime(56290+i+1) - prime(56290+i))/2 (i=0..12) having prime values 5, 3, 3, 7, 3, 5, 7, 11, 19, 2, 3, 3, 3 respectively.
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MATHEMATICA
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d[n_]:=(Prime[n+1]-Prime[n])/2
m=0; Do[Do[If[PrimeQ[d[n+i]]==False, Goto[aa]], {i, 0, 12}]; m=m+1; Print[m, " ", n]; Label[aa]; Continue, {n, 1, 4901245}]
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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