Numbers k such that 1*k + 1, 3*k + 1, 9*k + 1, 27*k + 1, 81*k + 1, 243*k + 1 are all primes.
A112043
Numbers k such that 1*k + 1, 3*k + 1, 9*k + 1, 27*k + 1, 81*k + 1, 243*k + 1 are all primes.
Terms
- a(0) =1171240a(1) =1197630a(2) =2023140a(3) =3592890a(4) =4132590a(5) =4151910a(6) =4254250a(7) =4484760a(8) =5167050a(9) =5486110a(10) =7121590a(11) =7279930a(12) =12524820a(13) =13527640a(14) =13595470a(15) =15998640a(16) =17211040a(17) =17269000a(18) =18570370a(19) =20040300a(20) =20402760a(21) =21135310a(22) =21735420
External references
- oeis: A112043