A107820 - OEIS

A107820

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

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

(list; graph; refs; listen; history; text; internal format)

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 *)