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%I #9 Jul 22 2021 02:01:43
%S 1432,220425,499997,3437037,3518771,5693370,8913770
%N Numbers k such that sigma(k) plus the k-th prime gives a fourth power.
%e sigma(499997) + p(499997) = 7890481 = 53^4.
%o (PARI) isok(n) = ispower(sigma(n) + prime(n), 4); \\ _Michel Marcus_, Jan 11 2014
%Y Cf. A114081, subsequence of A114082.
%K nonn
%O 1,1
%A _Giovanni Resta_, Feb 13 2006