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A079551
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Sum_{primes p <= n } d(p-1), where d() = A000005.
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2
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0, 0, 1, 3, 3, 6, 6, 10, 10, 10, 10, 14, 14, 20, 20, 20, 20, 25, 25, 31, 31, 31, 31, 35, 35, 35, 35, 35, 35, 41, 41, 49, 49, 49, 49, 49, 49, 58, 58, 58, 58, 66, 66, 74, 74, 74, 74, 78, 78, 78, 78, 78, 78, 84, 84, 84, 84, 84, 84, 88, 88, 100, 100, 100, 100, 100, 100, 108, 108, 108, 108
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,4
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COMMENTS
| Equals row sums of triangle A143540 [From Gary W. Adamson (qntmpkt(AT)yahoo.com), Aug 23 2008]
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REFERENCES
| D. S. Mitrinovic et al., Handbook of Number Theory, Kluwer, p. 49.
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FORMULA
| Several asymptotic estimates are known: see Mitrinovic.
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CROSSREFS
| Cf. A000005, A079552.
A143540 [From Gary W. Adamson (qntmpkt(AT)yahoo.com), Aug 23 2008]
Sequence in context: A110261 A168237 A049318 * A182843 A008805 A188270
Adjacent sequences: A079548 A079549 A079550 * A079552 A079553 A079554
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KEYWORD
| nonn
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com), Jan 24 2003
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