Numbers n such that n is a substring of its square in base 3 (written in base 10).

Terms

a(0) =0a(1) =1a(2) =3a(3) =7a(4) =9a(5) =27a(6) =32a(7) =43a(8) =81a(9) =131a(10) =243a(11) =287a(12) =706a(13) =729a(14) =1330a(15) =1390a(16) =1679a(17) =1832a(18) =2187a(19) =2899a(20) =3848a(21) =4170a(22) =5234a(23) =6436a(24) =6561a(25) =11544a(26) =12510a(27) =14261a(28) =19308a(29) =19683