A342548 Factors k > 0 such that the polynomial k*x^3 + x^2 + 1 produces a record of its Hardy-Littlewood constant.

1, 3, 21, 69, 81, 99, 489, 8169

Offset

1,2

Comments

For more information and references see A331950.

Links

Table of n, a(n) for n=1..8.

Example

  n  a(n)   Hardy-Littlewood
            constant (rounded)
  1     1   3.0750320679
  2     3   3.3225199464
  3    21   4.3206296013
  4    69   4.3659028300
  5    81   4.9042526822
  6    99   6.0219444490
  7   489   6.5115238241
  8  8169   6.7898774153

Crossrefs

Cf. A331950, A342547, A342549.

Sequence in context: A117984 A050615 A145658 * A188667 A083564 A281008

Adjacent sequences: A342545 A342546 A342547 * A342549 A342550 A342551

Keyword

nonn,more,hard

Author

Hugo Pfoertner, May 01 2021

Status

approved