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Search: id:A063807
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| A063807 |
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a(0) = 0, a(n+1) = a(n) + next prime larger than a(n). |
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+0
2
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| 0, 2, 5, 12, 25, 54, 113, 240, 481, 968, 1939, 3888, 7777, 15566, 31135, 62274, 124571, 249148, 498329, 996660, 1993349, 3986706, 7973417, 15946836, 31893677, 63787390, 127574781, 255149570, 510299161, 1020598332, 2041196671
(list; graph; listen)
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OFFSET
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0,2
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EXAMPLE
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For instance 0+2=2, 2+3=5, 5+7=12, 12+13=25, 25+29=54 ......
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MATHEMATICA
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Needs[ "NumberTheory`NumberTheoryFunctions`" ]; NestList[ # + NextPrime[ # ] &, 2, 50 ]
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PROGRAM
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(PARI) s(n)=if(n<1, n=0, s(n-1)+nextprime(s(n-1)+1)); for(n=0, 21, print(s(n)))
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CROSSREFS
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Sequence in context: A067331 A116734 A122439 this_sequence A116715 A117177 A132977
Adjacent sequences: A063804 A063805 A063806 this_sequence A063808 A063809 A063810
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KEYWORD
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nonn
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AUTHOR
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Pedro Ortiz-Villajos (perico1(AT)erols.com), Aug 20 2001
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EXTENSIONS
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More terms from Harvey P. Dale (hpd1(AT)nyu.edu) and Jason Earls (zevi_35711(AT)yahoo.com), Aug 20 2001
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