Numbers n such that n and n+4 are both brilliant numbers (A078972).

Terms

a(0) =6a(1) =10a(2) =21a(3) =319a(4) =403a(5) =529a(6) =667a(7) =799a(8) =1003a(9) =1513a(10) =1537a(11) =2623a(12) =2809a(13) =4183a(14) =16459a(15) =23707a(16) =24613a(17) =31309a(18) =34117a(19) =35179a(20) =35653a(21) =37399a(22) =37669a(23) =39913a(24) =40723a(25) =43357a(26) =46243a(27) =46513a(28) =49183a(29) =50689