Automorphic numbers: n^2 ends with n in base 15 (written in base 10).

Terms

a(0) =0a(1) =1a(2) =6a(3) =10a(4) =100a(5) =126a(6) =1000a(7) =2376a(8) =4375a(9) =46251a(10) =156250a(11) =603126a(12) =3640626a(13) =7750000a(14) =19140625a(15) =151718751a(16) =835156251a(17) =1727734375a(18) =5960937501a(19) =32482421875a(20) =236621093751a(21) =340029296875