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

1,1

Links

Table of n, a(n) for n=1..52.

Example

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

Crossrefs

Cf. A001358, A115683.

Sequence in context: A098485 A293399 A120712 * A039566 A032817 A357741

Adjacent sequences: A115695 A115696 A115697 * A115699 A115700 A115701

Keyword

nonn,base

Author

Giovanni Resta, Jan 31 2006

Status

approved