OFFSET
1,1
LINKS
Amiram Eldar, Table of n, a(n) for n = 1..10000
FORMULA
a(n) = a(n-480) + 30030 = a(n-1) + a(n-480) - a(n-481). - Charles R Greathouse IV, Nov 19 2014
Lim_{n->infinity} a(n)/n = A038111(6)/A038110(6) = 1001/16 = 62.5625. - Vladimir Shevelev, Jan 20 2015
a(n) = 13*A008365(n).
EXAMPLE
a(2) = 13*13, a(3) = 13*17.
MATHEMATICA
Select[ 13Range@ 225, GCD[#, 2310] == 1 &] (* Robert G. Wilson v, Dec 18 2014 *)
PROG
(PARI) is(n)=n%13==0 && gcd(n, 2310)==1 \\ Charles R Greathouse IV, Nov 19 2014
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Robert G. Wilson v, Jun 15 2003
EXTENSIONS
More terms from David Wasserman, Oct 19 2004
STATUS
approved