A369104 - OEIS

%I #24 Feb 03 2025 13:53:47

%S 6,7,6,2,7,0,2,2,2,6,8,6,3,4,5,1,5,7,4,1,2,6,3,1,0,5,3,5,7,4,5,0,8,0,

%T 5,0,9,0,2,1,6,6,8,4,5,8,1,3,0,7,0,7,2,2,2,5,3,1,9,8,6,1,7,4,1,6,1,2,

%U 4,8,6,7,8,3,8,8,4,9,4,6,7,3,4,0,6,5,8,5,7,4,0,6,6,2,3,0,3,9,7,9,0,0,4,1,7,5,8,7,9,4,5,8,2,4,8,3,8,6,5,5,5,2,2,6,0,8,2,7,9,5,4,6,6,7,7

%N Decimal expansion of Pi*(Pi-2)/(4+(Pi-2)^2).

%C This is the prefactor of the Hall resistivity of strange metals in the high magnetic field regime. The number comes from a phenomenological model using a modified Boltzmann equation. See the link for details.

%H R. D. H. Hinlopen, F. A. Hinlopen, J. Ayres, and N. E. Hussey, <a href="https://doi.org/10.1103/PhysRevResearch.4.033195">B^2 to B-linear magnetoresistance due to impeded orbital motion</a>, Physical Review Research 4, no. 3 (2022): 033195.

%e 0.67627022268...

%t First[RealDigits[Pi*(Pi-2)/(4+(Pi-2)^2), 10, 120, 0]] (* _Paolo Xausa_, Jun 29 2024 *)

%o (Python)

%o from sympy import pi, N;

%o def A369104(n):

%o     return list(map(int, str(N((pi*(pi-2))/(4+(pi-2)**2), n)).replace(".", "")))

%Y Cf. A369103, A019669, A000796.

%K nonn,cons

%O 0,1

%A _Bence Bernáth_, Jan 13 2024

%E Leading 0 removed and offset changed to 0 by _Georg Fischer_, Feb 03 2025