programming, pardon the pun. Its only appeal is that one can possibly attain progressions

up to twice as long as usual, I think.

Some examples: if we pretend that negatives can be prime, then

13 - 5#*n*(-1)^n is prime from n=0 to n=9.

1447 - 6*5#*n*(-1)^n is prime from n=0 to n=10.

9433 + 7*7#*n*(-1)^n is prime from n=0 to n=14.

But I think the law of diminishing returns quickly sets in.

Mark