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Search: id:A084766
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| A084766 |
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Sum of numbers of prime-factors {2*n-p: 2<p<2*n, p prime}, with repetitions. |
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+0
2
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| 0, 0, 1, 2, 3, 4, 5, 6, 6, 8, 9, 8, 11, 12, 11, 15, 14, 12, 18, 17, 14, 19, 20, 17, 22, 23, 18, 26, 25, 18, 28, 26, 23, 33, 28, 24, 32, 32, 27, 35, 36, 28, 41, 41, 26, 43, 42, 32, 45, 40, 33, 46, 46, 37, 48, 48, 36, 52, 53, 35, 58, 55, 38, 61, 51, 43, 59, 59, 49, 57
(list; graph; listen)
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OFFSET
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1,4
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LINKS
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Index entries for sequences related to Goldbach conjecture
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EXAMPLE
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n=10, 2*10=20: 20-3=17, 20-5=15=3*5, 20-7=13, 20-11=9=3*3, 20-13=7, 20-17=3, and 20-19=1: with a(10)=8 primes 3,3,3,3,5,7,13,17.
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CROSSREFS
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Cf. A084767.
Sequence in context: A097621 A017851 A061468 this_sequence A128559 A122168 A017856
Adjacent sequences: A084763 A084764 A084765 this_sequence A084767 A084768 A084769
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KEYWORD
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nonn
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AUTHOR
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Reinhard Zumkeller (reinhard.zumkeller(AT)lhsystems.com), Jun 03 2003
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