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A139091
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a(n) = largest prime divisor of the number prime(n)!/9 + 1.
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4
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17, 827, 22319071, 1718296754087, 35662591735219, 477262171871, 1609727002420791262479701, 146215297537890243023, 2020914387433686758547638152441, 1073774770807266077323
(list; graph; refs; listen; history; internal format)
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OFFSET
| 4,1
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MATHEMATICA
| a = {}; Do[w = FactorInteger[(Prime[n]! + 9)/9]; AppendTo[a, Last[w][[1]]], {n, 4, 16}]; a
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CROSSREFS
| Cf. A082672, A089085, A089130, A117141, A007749, A139056, A139057, A139058, A139059, A139060, A139061, A139061, A139062, A139063, A139064, A139065, A139066, A020458, A139068, A137390, A139070, A139071, A139072, A139073, A139074, A139074, A139075, A136019, A136020, A136026, A136027, A139089, A139090, A139091, A139092.
Sequence in context: A012221 A012144 A191963 * A173983 A124235 A086265
Adjacent sequences: A139088 A139089 A139090 * A139092 A139093 A139094
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KEYWORD
| nonn
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AUTHOR
| Artur Jasinski (grafix(AT)csl.pl), Apr 08 2008
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