a(n) = 6*n + 4.

Terms

a(0) =4a(1) =10a(2) =16a(3) =22a(4) =28a(5) =34a(6) =40a(7) =46a(8) =52a(9) =58a(10) =64a(11) =70a(12) =76a(13) =82a(14) =88a(15) =94a(16) =100a(17) =106a(18) =112a(19) =118a(20) =124a(21) =130a(22) =136a(23) =142a(24) =148a(25) =154a(26) =160a(27) =166a(28) =172a(29) =178