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A107820
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a(1)=3, a(2)=5; thereafter a(n) = n+5.
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0
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3, 5, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76
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OFFSET
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1,1
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COMMENTS
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The old definition (which does not fit the sequence) was "Slowest increasing sequence where a(n)-n is prime".
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LINKS
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FORMULA
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G.f.: -x*(2*x^3 - x^2 + x - 3)/(x - 1)^2. - Jinyuan Wang, Apr 10 2020
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MATHEMATICA
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PROG
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(PARI) a(n) = if(n<3, 2*n+1, n+5); \\ M. F. Hasler, Sep 06 2011
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CROSSREFS
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KEYWORD
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nonn,easy,less
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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