Base numbers of 9-gonal palindromic numbers.

Terms

a(0) =1a(1) =2a(2) =6a(3) =12a(4) =17a(5) =44a(6) =74a(7) =139a(8) =1123a(9) =1411a(10) =2101a(11) =4070a(12) =11323a(13) =11472a(14) =12870a(15) =16318a(16) =16853a(17) =18729a(18) =52642a(19) =132619a(20) =435644a(21) =446904a(22) =168566853a(23) =350096787a(24) =521037077a(25) =708609429a(26) =1121857192a(27) =1641773578a(28) =11947307367a(29) =21633254881