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%I #6 May 01 2021 13:49:11
%S 1,3,21,69,81,99,489,8169
%N Factors k > 0 such that the polynomial k*x^3 + x^2 + 1 produces a record of its Hardy-Littlewood constant.
%C For more information and references see A331950.
%e n a(n) Hardy-Littlewood
%e constant (rounded)
%e 1 1 3.0750320679
%e 2 3 3.3225199464
%e 3 21 4.3206296013
%e 4 69 4.3659028300
%e 5 81 4.9042526822
%e 6 99 6.0219444490
%e 7 489 6.5115238241
%e 8 8169 6.7898774153
%Y Cf. A331950, A342547, A342549.
%K nonn,more,hard
%O 1,2
%A _Hugo Pfoertner_, May 01 2021