Sums of two powers of 9.

Terms

a(0) =2a(1) =10a(2) =18a(3) =82a(4) =90a(5) =162a(6) =730a(7) =738a(8) =810a(9) =1458a(10) =6562a(11) =6570a(12) =6642a(13) =7290a(14) =13122a(15) =59050a(16) =59058a(17) =59130a(18) =59778a(19) =65610a(20) =118098a(21) =531442a(22) =531450a(23) =531522a(24) =532170a(25) =538002a(26) =590490a(27) =1062882a(28) =4782970a(29) =4782978