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A161669
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Sum_{x=nth nonprime..nth prime} x.
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1
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3, 6, 9, 13, 38, 55, 108, 124, 185, 330, 376, 550, 671, 736, 897, 1155, 1470, 1566, 1927, 2178, 2266, 2664, 2958, 3444, 4158, 4521, 4653, 5037, 5215, 5580, 7182, 7656, 8418, 8602, 9999, 10251, 11128, 12040, 12597, 13566, 14570, 14875, 16683, 16951, 17612
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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EXAMPLE
| 3(=0+1+2=sum_{x=0..2} x), 6(=1+2+3=sum_{x=1..3} x), 9(=4+5=Sum_{x=4..5} x), 13(=6+7=Sum_{x=6..7} x), 38(=8+9+10+11=Sum_{x=8..11} x), etc.
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PROG
| (PARI) k=0; p=2; for(i=1, 1e2, s=p*(p+1)/2-k*(k-1)/2; print1(s", "); p=nextprime(p+1); while(isprime(k++), ))
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CROSSREFS
| Sequence in context: A137041 A153006 A086838 * A128261 A187263 A000791
Adjacent sequences: A161666 A161667 A161668 * A161670 A161671 A161672
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KEYWORD
| nonn,base,easy
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AUTHOR
| Juri-Stepan Gerasimov (2stepan(AT)rambler.ru), Jun 16 2009, Jun 27 2009
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EXTENSIONS
| Corrected and extended by Charles R Greathouse IV (charles.greathouse(AT)case.edu), Mar 25 2010
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