OFFSET
1,2
COMMENTS
x=c(i)=i-th composite and y=p(j)=j-th prime.
EXAMPLE
If x=1 and y=5, then (3*1*5-5-6)/(3*1+1)=4/4=1=a(1).
If x=9 and y=53, then (3*9*53-53-6)/(3*9+1)=1372/28=49=a(2).
If x=10 and y=59, then (3*10*59-59-6)/(3*10+1)=1705/31=55=a(3).
If x=15 and y=89, then (3*15*89-89-6)/(3*15+1)=3910/46=85=a(4).
If x=25 and y=149, then (3*25*149-149-6)/(3*25+1)=11020/76=145=a(5).
If x=30 and y=179, then (3*30*179-179-6)/(3*30+1)=15925/91=175=a(6),
etc.
CROSSREFS
KEYWORD
nonn
AUTHOR
Juri-Stepan Gerasimov, Aug 28 2008
STATUS
approved