Smallest palindrome divisible by an n-th power.

Terms

a(0) =1a(1) =2a(2) =4a(3) =8a(4) =272a(5) =2112a(6) =2112a(7) =4224a(8) =8448a(9) =44544a(10) =405504a(11) =405504a(12) =405504a(13) =8634368a(14) =8634368a(15) =487030784a(16) =677707776a(17) =4285005824a(18) =4285005824a(19) =4285005824a(20) =29142024192a(21) =29142024192a(22) =29142024192a(23) =29142024192a(24) =29142024192