Numbers m such that 6m+1, 12m+1, 18m+1, 36m+1 and 72m+1 are all prime.

Terms

a(0) =1a(1) =121a(2) =380a(3) =506a(4) =511a(5) =3796a(6) =5875a(7) =6006a(8) =8976a(9) =9025a(10) =9186a(11) =10920a(12) =12245a(13) =12896a(14) =14476a(15) =14800a(16) =15386a(17) =22451a(18) =23471a(19) =32326a(20) =35175a(21) =38460a(22) =39536a(23) =40420a(24) =41456a(25) =43430a(26) =44415a(27) =59901a(28) =60076a(29) =61341