A071714 Numbers n such that Rd(n) + Ld(n) +/-1 is prime, where Rd and Ld are the right- and left-digital factorial functions.

2, 3, 6, 9, 33, 90, 102, 195, 210, 276, 379, 380, 402, 414, 575, 588, 616, 618, 916, 939, 980, 984, 1110, 1112, 1210, 1314, 1614, 2132, 2136, 2166, 2190, 2280, 2372, 2394, 2438, 2468, 2730, 2780, 3360, 3436, 3510, 3816, 3842, 3940, 3950, 4222, 4236, 4344

Offset: 1

Author

Jason Earls, Jun 03 2002

Keywords

• base
• nonn

Examples

			195 is a term because (195*95*5)+(195*19*1)+1 = 96331 and (195*95*5)+(195*19*1)-1 = 96329 are both prime.
		

Crossrefs

Cf. A067079, A067080.