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A034936
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Numbers n such that 3*n+4 is prime.
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11
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1, 3, 5, 9, 11, 13, 19, 21, 23, 25, 31, 33, 35, 41, 45, 49, 51, 53, 59, 63, 65, 69, 73, 75, 79, 89, 91, 93, 101, 103, 109, 111, 115, 121, 123, 125, 131, 135, 139, 143, 145, 151, 153, 161, 165, 173, 179, 181, 189, 191, 199, 201, 203, 205, 209, 213, 219, 223, 229
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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COMMENTS
| Related to hyperperfect numbers of a certain form.
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LINKS
| J. S. McCranie, A study of hyperperfect numbers, J. Int. Seqs. Vol. 3 (2000) #P00.1.3
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FORMULA
| a(n) = A024892(n)-1 = 2*A024899(n)-1.
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MATHEMATICA
| lst={}; Do[p=n+(n+1)+(n+3); If[PrimeQ[p], AppendTo[lst, n]], {n, 5!}]; lst [From Vladimir Orlovsky (4vladimir(AT)gmail.com), May 22 2009]
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PROG
| (MAGMA) [n: n in [1..1000] |IsPrime(3*n+4)] [From Vincenzo Librandi, Nov 17 2010]
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CROSSREFS
| Cf. A038536 and A002476.
A002476 gives primes, A091178 gives prime index.
Sequence in context: A190523 A161781 A007950 * A204657 A167791 A139099
Adjacent sequences: A034933 A034934 A034935 * A034937 A034938 A034939
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KEYWORD
| nonn
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AUTHOR
| Jud McCranie (JudMcCranie(AT)ugaalum.uga.edu)
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