OFFSET
1,2
LINKS
Nathaniel Johnston, Table of n, a(n) for n = 1..10000
EXAMPLE
0 = 0/1, 12 = 108/9, 21 = 315/15, 30 = 630/21, 36 = 900/25 and so on.
MAPLE
ithnonprime := proc(n)local k: option remember: if(n=1)then return 1: else k := procname(n-1)+1: while true do if(not isprime(k))then return k fi: k:=k+1: od: fi: end: A179899ind := proc(n) option remember: local k: if(n=1)then return 1:fi: for k from procname(n-1)+1 do if(ithnonprime(k) mod 2 <> 0)then return k: fi: od: end: A179899 := proc(n) return 3*(ithnonprime(A179899ind(n))-1)/2: end: seq(A179899(n), n=1..55); # Nathaniel Johnston, May 05 2011
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Odimar Fabeny, Jul 31 2010
EXTENSIONS
More terms from Odimar Fabeny, Aug 12 2010
Definition rephrased by R. J. Mathar, Sep 01 2010
STATUS
approved