A031880 - OEIS

%I #14 Nov 15 2019 07:04:40

%S 1,9,33,99,111,141,171,303,393,535,717,777,979,1441,1771,3003,3223,

%T 3663,5335,7447,9009,9339,9999,11011,11811,11911,12121,12321,12621,

%U 13531,14041,14541,14841,17671,18381,18681,19791,30303,31713,32223

%N Lucky numbers that are both palindromic and nonprime.

%H Amiram Eldar, <a href="/A031880/b031880.txt">Table of n, a(n) for n = 1..5436</a> (terms below 10^9)

%Y Intersection of A000959 and A032350.

%K nonn,base

%O 1,2

%A _Patrick De Geest_

%E Name corrected by _Amiram Eldar_, Nov 15 2019