A115698 Semiprimes (A001358) whose digit reversal is the product of 2 palindromes greater than 1.

4, 6, 9, 21, 22, 33, 46, 51, 55, 65, 77, 82, 94, 121, 202, 203, 253, 262, 303, 393, 407, 427, 445, 446, 451, 485, 505, 559, 583, 626, 667, 669, 671, 687, 707, 789, 803, 849, 869, 889, 939, 1042, 1111, 1441, 1622, 1661, 1991, 2031, 2123, 2157, 2173, 2321

Offset: 1

Author

Giovanni Resta, Jan 31 2006

Keywords

• nonn
• base

Examples

			669=3*223 is semiprime and 966=6*161.
		

Crossrefs

Cf. A001358, A115683.