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A138399
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Ennea-Primes. Prime Numbers n (single prime number in-between 8 twin primes) such that Sum of 9 prime numbers (8 twin primes and single prime number in-between) are primes.
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0
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OFFSET
| 1,1
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COMMENTS
| {5 penta-} {9 ennea-} Table of non-technical numeric prefixes -- http://en.wikipedia.org/wiki/Numerical_prefix
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EXAMPLE
| {4229,4231} {4241,4243} {4253} {4259,4261} {4271,4273} Sum = 38261.
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MATHEMATICA
| a={}; Do[p0=Prime[n]; a1=Prime[n-4]; a2=Prime[n-3]; b1=Prime[n-2]; b2=Prime[n-1]; c1=Prime[n+1]; c2=Prime[n+2]; d1=Prime[n+3]; d2=Prime[n+4]; sp=a1+a2+b1+b2+p0+c1+c2+d1+d2; If[PrimeQ[sp]&&a2-a1==2&&b2-b1==2&&c2-c1==2&&d2-d1==2, AppendTo[a, p0]], {n, 5, 10^6}]; a
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CROSSREFS
| Sequence in context: A204638 A205995 A031985 * A023346 A101619 A204408
Adjacent sequences: A138396 A138397 A138398 * A138400 A138401 A138402
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KEYWORD
| nonn,uned
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AUTHOR
| Vladimir Orlovsky (4vladimir(AT)gmail.com), May 08 2008
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