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Search: id:A098039
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| A098039 |
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Numbers p such that p = (prime(n)+ prime(n+3))/2 is prime for prime indices n=2, 3, 5... |
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+0
1
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| 7, 23, 37, 47, 73, 809, 1453, 1931, 2621, 3571, 3917, 4793, 7901, 8819, 9467, 10181, 11657, 12421, 12659, 12781, 13229, 14449, 17383, 21739, 22079, 24151, 26501, 28663, 30881, 32749, 33353, 34439, 38083, 38501, 42467, 42703, 43397, 48091
(list; graph; listen)
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OFFSET
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2,1
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EXAMPLE
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prime(7)+ prime(10) = 17+29. 46/2 = 23, the second term in the table.
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PROGRAM
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(PARI) g(n, m) = forprime(x=1, n, y=(prime(x)+prime(x+m)); if(y%2==0&isprime(y/2), print1(y\2", ")))
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CROSSREFS
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Sequence in context: A007522 A157811 A098029 this_sequence A132237 A143030 A031043
Adjacent sequences: A098036 A098037 A098038 this_sequence A098040 A098041 A098042
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KEYWORD
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easy,nonn
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AUTHOR
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Cino Hilliard (hillcino368(AT)gmail.com), Sep 10 2004
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