A369103 - OEIS

%I #19 Jan 13 2024 15:05:18

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

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

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

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

%C This is the prefactor of the linear magnetoresistance 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.

%D R. D. H. Hinlopen, F. A. Hinlopen, J. Ayres, and N. E. Hussey. B^2 to B-linear magnetoresistance due to impeded orbital motion, Physical Review Research 4, no. 3 (2022): 033195.

%H R. D. H. Hinlopen, F. A. Hinlopen, J. Ayres, and N. E. Hussey, <a href="https://journals.aps.org/prresearch/abstract/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 2*Pi/(4+(Pi-2)^2) = 1.18478376776...

%t First[RealDigits[2 Pi/(4+(Pi-2)^2), 10, 120]] (* _Paolo Xausa_, Jan 13 2024 *)

%o (Python)

%o from sympy import pi, N;

%o def A369103(n):

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

%Y Cf. A369104, A019669, A000796.

%K nonn,cons

%O 1,3

%A _Bence Bernáth_, Jan 13 2024