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%I #8 Feb 15 2020 21:09:25
%S 9,67,163,193,201,202,271,338,469,489,505,547,579,606,670,673,729,813,
%T 982,1087,1111,1123,1139,1141,1153,1201,1223,1351,1354,1407,1414,1423,
%U 1474,1515,1543,1601,1630,1641,1642,1791,1873,1897,1930,1966,2010,2017,2019,2077,2083,2088,2323,2326,2371,2447,2455,2467,2503
%N Numbers k such that sigma(sigma(k)) is congruent to 6 modulo 8.
%H Antti Karttunen, <a href="/A332456/b332456.txt">Table of n, a(n) for n = 1..10000</a>
%H <a href="/index/Si#SIGMAN">Index entries for sequences related to sigma(n)</a>
%o (PARI) isA332456(n) = (6==(sigma(sigma(n))%8));
%Y Cf. A000203, A051027, A332226, A332457, A332458.
%K nonn
%O 1,1
%A _Antti Karttunen_, Feb 15 2020