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Terms

a(0) =9a(1) =9a(2) =81a(3) =99a(4) =891a(5) =9801a(6) =9801a(7) =19602a(8) =39204a(9) =79497a(10) =499851a(11) =548856a(12) =1077021a(13) =2274822a(14) =4459554a(15) =8909109a(16) =70282971a(17) =87111288a(18) =664223571a(19) =730645938a(20) =5791910751a(21) =6272012637a(22) =36351143631a(23) =49985258994a(24) =88971507999a(25) =789520249881a(26) =868572264879