A115666 - OEIS

%I #2 Mar 30 2012 17:40:35

%S 4,6,9,51,94,121,122,143,155,158,169,178,187,319,323,329,335,341,394,

%T 398,718,734,737,766,767,781,913,926,949,955,961,979,982,985,989,998,

%U 1141,1202,1211,1273,1322,1343,1405,1415,1655,1691,1703,1714,1807

%N Semiprimes (A001358) whose digit reversal is a brilliant number (A078972).

%e 155=5*31 is semiprime and 551=19*29 is brilliant.

%Y Cf. A001358, A078972, A115665.

%K nonn,base

%O 1,1

%A _Giovanni Resta_, Jan 31 2006