Smallest powerful number (definition 1) such that a(n)+n is also powerful.

Terms

a(0) =8a(1) =25a(2) =1a(3) =4a(4) =4a(5) =214369a(6) =1a(7) =1a(8) =16a(9) =2187a(10) =16a(11) =4a(12) =36a(13) =30459361a(14) =1a(15) =9a(16) =8a(17) =9a(18) =8a(19) =16a(20) =4a(21) =27a(22) =4a(23) =1a(24) =100a(25) =1a(26) =9a(27) =4a(28) =196a(29) =6859