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A143293
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Partial sums of A002110, the primorial numbers.
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0
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1, 3, 9, 39, 249, 2559, 32589, 543099, 10242789, 233335659, 6703028889, 207263519019, 7628001653829, 311878265181039, 13394639596851069, 628284422185342479, 33217442899375387209, 1955977793053588026279
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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COMMENTS
| After 3, this is never prime because all values thereafter are multiples of 3. After a(6) all are also multiples of 17. [From Jonathan Vos Post (jvospost3(AT)gmail.com), Feb 10 2010]
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FORMULA
| a(n) = Sum__{0..n} p#
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EXAMPLE
| a(3) = 39 = (1 + 2 + 6 + 30), where A002110 = (1, 2, 6, 30, 210, 2310,...).
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CROSSREFS
| Cf. A002110.
Sequence in context: A058105 A090012 A079096 * A101395 A133189 A020092
Adjacent sequences: A143290 A143291 A143292 * A143294 A143295 A143296
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KEYWORD
| nonn
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AUTHOR
| Gary W. Adamson (qntmpkt(AT)yahoo.com), Aug 05 2008
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EXTENSIONS
| a(11)-a(19) from Jonathan Vos Post (jvospost3(AT)gmail.com), Feb 10 2010
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