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Least m such that reverse(sigma(m)) = sigma(m+n).
0

%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