OFFSET
1,1
EXAMPLE
a(7)=247: p(247)=1567 and p(248)=1571, the first cousin prime pair; p(249)=1579 and p(250)=1583, the second cousin prime pair; p(251)=1597 and p(252)=1601, the third cousin prime pair.
CROSSREFS
KEYWORD
nonn
AUTHOR
Ray G. Opao, Jul 15 2004
STATUS
approved