A046378 Palindromes with exactly 4 palindromic prime factors (counted with multiplicity).
88, 484, 525, 686, 808, 2662, 3773, 3993, 4444, 6666, 9999, 14641, 24442, 34643, 36663, 40804, 52525, 134431, 224422, 336633, 1234321, 1596951, 2060602, 3090903, 11333311, 14699641, 22888822, 66888866, 104060401, 125888521, 134969431, 367888763, 413979314
Offset: 1
Examples
The palindrome 1596951 is a term since it has 4 factors 3^2 191 929, all palindromic.
Links
- Lars Blomberg, Table of n, a(n) for n = 1..320, terms < 10^16.
Extensions
More terms from Lars Blomberg, Nov 06 2015