OFFSET
1,2
COMMENTS
Least J values are given in A129192
EXAMPLE
2*3*5-2*3-1=23 prime but 2*3*5-2*3+1=25 composite
2*3*5-2*2*3-1=17 prime twin of 2*3*5-2*2*3+1=19 so K(2)=2 and J(2)=1
CROSSREFS
KEYWORD
nonn
AUTHOR
Pierre CAMI, Apr 02 2007
STATUS
approved