A369103 Decimal expansion of 2*Pi/(4+(Pi-2)^2).

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, 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, 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

Offset: 1

Author

Bence Bernáth, Jan 13 2024

Keywords

• nonn
• cons

Comments

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.

Examples

			1.18478376776...
		

Links

• 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.

Crossrefs

Cf. A369104, A019669, A000796.

Programs

Mathematica

First[RealDigits[2 Pi/(4+(Pi-2)^2), 10, 120]] (* Paolo Xausa, Jan 13 2024 *)

Python

from sympy import pi, N;
def A369103(n):
    return list(map(int, str(N(2*pi/(4+(pi-2)**2), n)).replace(".", "")))