Numbers n such that 6n and sigma(6n) are both a twin prime average.

Terms

a(0) =1a(1) =5a(2) =77a(3) =177a(4) =215a(5) =247a(6) =313a(7) =348a(8) =465a(9) =593a(10) =712a(11) =723a(12) =1092a(13) =1110a(14) =1218a(15) =1335a(16) =1433a(17) =1470a(18) =1673a(19) =1738a(20) =1755a(21) =1815a(22) =1990a(23) =2007a(24) =2153a(25) =2223a(26) =2293a(27) =2830a(28) =2903a(29) =2930