Numbers m such that 18*m + 1, 36*m + 1, 108*m + 1, and 162*m + 1 are all primes.

Terms

a(0) =1a(1) =71a(2) =155a(3) =176a(4) =241a(5) =346a(6) =420a(7) =540a(8) =690a(9) =801a(10) =1145a(11) =1421a(12) =1506a(13) =2026a(14) =2066a(15) =3080a(16) =3235a(17) =3371a(18) =3445a(19) =3511a(20) =3640a(21) =4746a(22) =4925a(23) =5681a(24) =5901a(25) =6055a(26) =6520a(27) =7931a(28) =8365a(29) =8970