Palindromic numbers that are fixed points of the TITO operation (see A161594) and are not products of palindromic primes.
72927, 76167, 434434, 868868, 1226221, 4778774, 5703075, 8755578, 9386839
1 seqfan posts
Wed Jun 24 23:35:23 CEST 2009 [seqfan] TITO sequences