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Search: id:A139060
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| A139060 |
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a(n) = primes of the form (4+k!)/4. |
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+0
43
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| 7, 31, 181, 1556755201, 12772735542927360001, 3877802510832746496000001, 65782709233423382541804503040000001, 203978820811974433586402817399028973568000000001
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OFFSET
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1,1
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COMMENT
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Numbers k for which (4+k!)/4 is prime see A139061
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MATHEMATICA
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a = {}; Do[If[PrimeQ[(n! + 4)/4], AppendTo[a, (n! + 4)/4]], {n, 1, 50}]; 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.
Sequence in context: A055625 A102239 A139151 this_sequence A060015 A094711 A135630
Adjacent sequences: A139057 A139058 A139059 this_sequence A139061 A139062 A139063
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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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