A046377 Palindromes with exactly 3 palindromic prime factors (counted with multiplicity).

8, 44, 66, 99, 242, 343, 363, 404, 606, 909, 1331, 2222, 2882, 3333, 5555, 6886, 7777, 12221, 15851, 20402, 26462, 30603, 37873, 39693, 112211, 145541, 167761, 226622, 248842, 339933, 347743, 662266, 664466, 668866, 682286, 993399, 996699