%I #5 Dec 15 2017 17:35:55
%S 5602,1426,20,15210,15,14,9,32494,35,22,15,14,338317,2145,46054,9,
%T 1705,23,16611,1238042,562,233,1771,8063,1605,15,14,261892,2201,35,
%U 36339,18,293,96,33849,47,146781,3104,166,31666,426,31119,20262,2101,2820,205
%N Least m such that reverse(sigma(m)) = sigma(m+n).
%e a(4)=15210 because sigma(15210) = 42822 and sigma(15210+4) = 22824.
%Y Cf. A000203.
%K nonn
%O 1,1
%A _Jason Earls_, Jun 07 2002