a(n) is the least palindrome that has exactly n palindromic divisors other than itself and 1.

Terms

a(0) =1a(1) =4a(2) =6a(3) =232a(4) =44a(5) =636a(6) =66a(7) =484a(8) =888a(9) =616a(10) =2442a(11) =2112a(12) =4224a(13) =6006a(14) =2772a(15) =26862a(16) =23232a(17) =232232a(18) =46464a(19) =297792a(20) =66066a(21) =88088a(22) =222222a(23) =252252a(24) =213312a(25) =21122112a(26) =234432a(27) =606606a(28) =828828a(29) =444444