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A115698 Semiprimes (A001358) whose digit reversal is the product of 2 palindromes greater than 1. 0
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 (list; graph; refs; listen; history; text; internal format)
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 A115681

Adjacent sequences:  A115695 A115696 A115697 * A115699 A115700 A115701

KEYWORD

nonn,base

AUTHOR

Giovanni Resta, Jan 31 2006

STATUS

approved

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Last modified October 17 03:15 EDT 2018. Contains 316275 sequences. (Running on oeis4.)