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A172239
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Partial sums of primorial primes A018239.
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0
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2, 5, 12, 43, 254, 2565, 200560492696, 1719620105458406433483340568317543019584575635895742560438771105058321655238562613083979651479555788009994557822024565226932906295208262756822476224186807
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OFFSET
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1,1
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COMMENTS
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The subsequence of primes in this sequence begin: a(1) = 2, a(2) = 5, a(4) = 43. The subsubsequence of primorial prime partial sums of primorial primes begins 2, 5. Will someone extend these subsequences?
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LINKS
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FORMULA
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a(n) = SUM[i=1..n] A018239(i) = SUM[i=1..n] {p in A006862 and p prime} = SUM[i=1..n] (1 + Product[j=1..i] A000040(i)).
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EXAMPLE
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a(4) = 2 + 3 + 7 + 31 = 43, which is prime, but not primorial prime.
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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