Numbers n such that Rd(n) + Ld(n) +/-1 is prime, where Rd and Ld are the right- and left-digital factorial functions.
A071714
Numbers n such that Rd(n) + Ld(n) +/-1 is prime, where Rd and Ld are the right- and left-digital factorial functions.
Terms
- a(0) =2a(1) =3a(2) =6a(3) =9a(4) =33a(5) =90a(6) =102a(7) =195a(8) =210a(9) =276a(10) =379a(11) =380a(12) =402a(13) =414a(14) =575a(15) =588a(16) =616a(17) =618a(18) =916a(19) =939a(20) =980a(21) =984a(22) =1110a(23) =1112a(24) =1210a(25) =1314a(26) =1614a(27) =2132a(28) =2136a(29) =2166
External references
- oeis: A071714