a(n) is the concatenation of the numbers k, 2 <= k <= 9, such that the base-k representation of n is a palindrome; a(n) = 0 if there is no such base.
A236366
a(n) is the concatenation of the numbers k, 2 <= k <= 9, such that the base-k representation of n is a palindrome; a(n) = 0 if there is no such base.
Terms
- a(0) =23456789a(1) =3456789a(2) =2456789a(3) =356789a(4) =246789a(5) =5789a(6) =2689a(7) =379a(8) =28a(9) =349a(10) =0a(11) =5a(12) =3a(13) =6a(14) =24a(15) =37a(16) =24a(17) =58a(18) =0a(19) =39a(20) =246a(21) =0a(22) =3a(23) =57a(24) =4a(25) =35a(26) =28a(27) =36a(28) =4a(29) =9
External references
- oeis: A236366