OFFSET

1,1

EXAMPLE

7 * 2 + 1 = 15 = 3 * 5, both of which are in the set.

7 * 3 + 1 = 22 = 2 * 11, both of which are in the set.

7 * 5 + 1 = 36 = 2^2 * 3^2; both 2 and 3 are in the set.

7 * 11 + 1 = 78 = 2 * 3 * 11, all three of which are in the set.

7 * 13 + 1 = 92 = 2^2 * 23; both 2 and 23 are in the set.

7 * 23 + 1 = 162 = 2 * 3^4; both 2 and 3 are in the set.

CROSSREFS

KEYWORD

nonn,fini,full

AUTHOR

STATUS

approved