a(n)^2 has last digit equal to the sum of the other digits.

Terms

a(0) =27a(1) =33a(2) =35a(3) =55a(4) =57a(5) =123a(6) =145a(7) =147a(8) =153a(9) =177a(10) =453a(11) =1497a(12) =3747a(13) =3873a(14) =4497a(15) =4797a(16) =10203a(17) =10503a(18) =31623a(19) =1002003a(20) =1005003a(21) =100020003a(22) =100050003a(23) =10000200003a(24) =10000500003