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Search: id:A154587
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| A154587 |
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Numbers that can be expressed as the sum of the first j prime numbers or the first k nonprime numbers, with j and k >=1. |
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+0
2
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| 5, 28, 71208, 74139, 9260197734, 12374540078, 7574780746329, 11101148723618, 102581905748236, 3325997869054417
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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Is this sequence finite?
Intersection of A007504 and A053767 generates 10,1988,14697,83292,... - R. J. Mathar, Jan 17 2009
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FORMULA
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A007504 INTERSECT A051349. - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jan 17 2009
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EXAMPLE
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5 = 2+3 = 1+4. 28 = 2+3+5+7+11 = 1+4+6+8+9
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CROSSREFS
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A007504, A051349, A133784
Sequence in context: A057642 A125137 A132550 this_sequence A083020 A033503 A057206
Adjacent sequences: A154584 A154585 A154586 this_sequence A154588 A154589 A154590
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KEYWORD
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more,nonn
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AUTHOR
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Paolo P. Lava & Giorgio Balzarotti (ppl(AT)spl.at), Jan 15 2009
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EXTENSIONS
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Corrected definition. Added 5th and 6th term. - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jan 17 2009
a(7)-a(10) from Donovan Johnson (donovan.johnson(AT)yahoo.com), Feb 19 2009
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