A093030 Largest palindromic divisor of n.

1, 2, 3, 4, 5, 6, 7, 8, 9, 5, 11, 6, 1, 7, 5, 8, 1, 9, 1, 5, 7, 22, 1, 8, 5, 2, 9, 7, 1, 6, 1, 8, 33, 2, 7, 9, 1, 2, 3, 8, 1, 7, 1, 44, 9, 2, 1, 8, 7, 5, 3, 4, 1, 9, 55, 8, 3, 2, 1, 6, 1, 2, 9, 8, 5, 66, 1, 4, 3, 7, 1, 9, 1, 2, 5, 4, 77, 6, 1, 8, 9, 2, 1, 7, 5, 2, 3, 88, 1, 9, 7, 4, 3, 2, 5, 8, 1, 7, 99, 5, 101

Offset: 1

Author

Jason Earls, May 07 2004

Keywords

• base
• easy
• nonn

Links

• Amiram Eldar, Table of n, a(n) for n = 1..10000

Crossrefs

Cf. A093888.

Programs

Mathematica

a[n_] := Module[{d = Divisors[n]}, k = Length[d]; While[!PalindromeQ[d[[k]]], k--]; d[[k]]]; Array[a, 101] (* Amiram Eldar, Dec 16 2019 *)