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

1,1

Links

Table of n, a(n) for n=1..48.

Example

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.

Sequence in context: A002076 A286435 A145761 * A077753 A353122 A058911

Adjacent sequences: A071711 A071712 A071713 * A071715 A071716 A071717

Keyword

base,nonn

Author

Jason Earls, Jun 03 2002

Status

approved