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Search: id:A139061
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| A139061 |
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a(n) = numbers k for which (4+k!)/4 is prime. |
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+0
44
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| 4, 5, 6, 13, 21, 25, 32, 40, 61, 97, 147, 324, 325, 348, 369
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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Primes of the form (4+k!)/4 see A139060
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MATHEMATICA
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a = {}; Do[If[PrimeQ[(n! + 4)/4], AppendTo[a, n]], {n, 1, 500}]; a
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CROSSREFS
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Cf. A082672, A089085, A089130, A117141, A007749, A139056, A139057, A139058, A139059, A139060, A139061, A139061, A139062, A139063, A139064, A139065, A139066, A020458, A139068, A137390, A139070, A139071, A139072.
Sequence in context: A089119 A063833 A167434 this_sequence A029645 A050162 A072564
Adjacent sequences: A139058 A139059 A139060 this_sequence A139062 A139063 A139064
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KEYWORD
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nonn
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AUTHOR
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Artur Jasinski (grafix(AT)csl.pl), Apr 07 2008
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