Least number x such that x^n has n digits equal to k. Case k = 9.

Terms

a(0) =9a(1) =63a(2) =99a(3) =131a(4) =99a(5) =983a(6) =864a(7) =1091a(8) =2137a(9) =1349a(10) =2053a(11) =3686a(12) =4053a(13) =5741a(14) =9609a(15) =3822a(16) =11924a(17) =7533a(18) =9096a(19) =22387a(20) =13502a(21) =5912a(22) =26942a(23) =19603a(24) =41735a(25) =46946a(26) =32113a(27) =56205a(28) =74549a(29) =99624