login

Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.

Factors k > 0 such that the polynomial k*x^3 + x^2 + 1 produces a record of its Hardy-Littlewood constant.
1

%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