

A221712


HardyLittlewood constant for x^2+x+41.


39



3, 3, 1, 9, 7, 7, 3, 1, 7, 7, 4, 7, 1, 4, 2, 1, 6, 6, 5, 3, 2, 3, 5, 5, 6, 8, 5, 7, 6, 4, 9, 8, 8, 7, 9, 6, 6, 4, 6, 8, 5, 5, 4, 5, 8, 5, 6, 5, 2, 9, 8, 5, 8, 4, 9, 1, 5, 3, 9, 4, 0, 7, 2, 7, 9, 5, 0, 2, 6, 3, 3, 1, 0, 4, 2, 6, 1, 1, 8, 1, 4, 9, 7, 3, 7, 5, 5
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OFFSET

1,1


REFERENCES

Henri Cohen, Number Theory, Vol II: Analytic and Modern Tools, Springer (Graduate Texts in Mathematics 240), 2007.


LINKS

Table of n, a(n) for n=1..87.
Karim Belabas, Henri Cohen, Computation of the HardyLittlewood constant for quadratic polynomials, PARI/GP script, 2020.
H. Cohen, Highprecision calculation of HardyLittlewood constants, (1998).
Henri Cohen, High precision computation of HardyLittlewood constants. [Cached pdf version, with permission]


EXAMPLE

3.31977317747142166532355685764988796646855...


PROG

(PARI) See Belabas, Cohen link. Run as HardyLittlewood2(x^2+x+41)/2 after setting the required precision.


CROSSREFS

Cf. A005846, A056561, A202018, A221713, A319906, A331876, A331877.
Sequence in context: A262143 A284554 A078033 * A193741 A193824 A108075
Adjacent sequences: A221709 A221710 A221711 * A221713 A221714 A221715


KEYWORD

nonn,cons


AUTHOR

N. J. A. Sloane, Jan 26 2013


EXTENSIONS

More terms from Hugo Pfoertner, Jan 31 2020


STATUS

approved



