Primes of the form m = 6^i + 6^j - 1, where i > j >= 0.

Terms

a(0) =41a(1) =251a(2) =1301a(3) =1511a(4) =46691a(5) =47951a(6) =279941a(7) =1679831a(8) =10077911a(9) =10124351a(10) =60466181a(11) =60466391a(12) =60473951a(13) =362797091a(14) =362797271a(15) =362843711a(16) =2176782371a(17) =2237248511a(18) =13060694051a(19) =13121160191a(20) =78364164101a(21) =78364164311a(22) =78364171871