The first number that is (at least) n-fold intrinsically 3-palindromic (represented in base ten).

Terms

a(0) =5a(1) =26a(2) =121a(3) =300a(4) =1009a(5) =1477a(6) =4591a(7) =15049a(8) =35101a(9) =35101a(10) =83161a(11) =176401a(12) =291721a(13) =291721a(14) =720721a(15) =1081081a(16) =1496881a(17) =2106721a(18) =3341521a(19) =3341521a(20) =5654881a(21) =7207201a(22) =8648641a(23) =10810801a(24) =13693681a(25) =15135121a(26) =21621601a(27) =28274401a(28) =28274401a(29) =41081041