a(n+1) = least palindrome not already used that is either a divisor or multiple of a(n) such that the ratios a(n+1)/a(n) are all distinct.

A111678

a(n+1) = least palindrome not already used that is either a divisor or multiple of a(n) such that the ratios a(n+1)/a(n) are all distinct.

Terms

    a(0) =1a(1) =2a(2) =6a(3) =3a(4) =33a(5) =11a(6) =44a(7) =4a(8) =88a(9) =22a(10) =616a(11) =7a(12) =161a(13) =16261a(14) =101a(15) =505a(16) =5a(17) =515a(18) =515515a(19) =55a(20) =5005a(21) =77a(22) =1001a(23) =6006a(24) =66a(25) =2112a(26) =8a(27) =232a(28) =25752a(29) =111

External references