Numbers k such that sum of digits (k) and sum of digits (k^2) is 9.

Terms

a(0) =9a(1) =18a(2) =45a(3) =90a(4) =180a(5) =351a(6) =450a(7) =900a(8) =1800a(9) =3510a(10) =4500a(11) =9000a(12) =18000a(13) =35100a(14) =45000a(15) =90000a(16) =180000a(17) =351000a(18) =450000a(19) =900000a(20) =1800000a(21) =3510000a(22) =4500000a(23) =9000000a(24) =18000000