

A107820


a(1)=3, a(2)=5; thereafter a(n) = n+5.


0



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

1,1


COMMENTS

The old definition (which does not fit the sequence) was "Slowest increasing sequence where a(n)n is prime".


LINKS

Table of n, a(n) for n=1..71.
Index entries for linear recurrences with constant coefficients, signature (2,1).


FORMULA

G.f.: x*(2*x^3  x^2 + x  3)/(x  1)^2.  Jinyuan Wang, Apr 10 2020


MATHEMATICA

Join[{3, 5}, Range[8, 80]] (* Harvey P. Dale, Jul 25 2019 *)


PROG

(PARI) a(n) = if(n<3, 2*n+1, n+5); \\ M. F. Hasler, Sep 06 2011


CROSSREFS

Sequence in context: A077523 A298516 A157291 * A191931 A325413 A328066
Adjacent sequences: A107817 A107818 A107819 * A107821 A107822 A107823


KEYWORD

nonn,easy,less


AUTHOR

Eric Angelini, Jun 11 2005


EXTENSIONS

Edited by N. J. A. Sloane, Sep 06 2011


STATUS

approved



