If a, b in sequence, so is ab+10.

Terms

a(0) =2a(1) =14a(2) =38a(3) =86a(4) =182a(5) =206a(6) =374a(7) =422a(8) =542a(9) =758a(10) =854a(11) =1094a(12) =1214a(13) =1454a(14) =1526a(15) =1718a(16) =2198a(17) =2438a(18) =2558a(19) =2894a(20) =2918a(21) =3062a(22) =3278a(23) =3446a(24) =4406a(25) =4886a(26) =5126a(27) =5246a(28) =5798a(29) =5846