The first n-fold (at least) intrinsically 2-palindromic number (in base ten).

Terms

a(0) =3a(1) =8a(2) =18a(3) =24a(4) =48a(5) =60a(6) =120a(7) =120a(8) =180a(9) =336a(10) =360a(11) =360a(12) =720a(13) =720a(14) =720a(15) =840a(16) =1260a(17) =1440a(18) =1680a(19) =1680a(20) =2520a(21) =2520a(22) =2520a(23) =2520a(24) =5040a(25) =5040a(26) =5040a(27) =5040a(28) =5040a(29) =5040