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Search: id:A133489
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| A133489 |
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a(1)=2. For n >= 2, a(n) = a(n-1) + 1 + (the largest prime among the first n-1 terms of the sequence {a(k)}). |
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+0
1
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| 2, 5, 11, 23, 47, 95, 143, 191, 383, 767, 1151, 2303, 3455, 4607, 5759, 6911, 13823, 20735, 27647, 55295, 82943, 110591, 138239, 276479, 414719, 552959, 691199, 1382399, 2073599, 2764799, 3455999, 6911999, 10367999, 13823999, 17279999
(list; graph; listen)
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OFFSET
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1,1
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LINKS
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Leroy Quet, Home Page (listed in lieu of email address)
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EXAMPLE
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The largest prime among the first 7 terms of the sequence is a(5)=47. So a(8) = a(7) + 1 + 47 = 143 + 1 + 47 = 191.
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MATHEMATICA
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a = {2}; Do[AppendTo[a, a[[ -1]] + 1 + Select[a, PrimeQ[ # ] &][[ -1]]], {40}]; a - Stefan Steinerberger (stefan.steinerberger(AT)gmail.com), Dec 03 2007
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CROSSREFS
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Sequence in context: A075712 A000100 A083005 this_sequence A060153 A086219 A055010
Adjacent sequences: A133486 A133487 A133488 this_sequence A133490 A133491 A133492
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KEYWORD
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nonn
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AUTHOR
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Leroy Quet Nov 30 2007
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EXTENSIONS
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More terms from Stefan Steinerberger (stefan.steinerberger(AT)gmail.com), Dec 03 2007
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