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

1,3

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.

References

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.

Links

Table of n, a(n) for n=1..97.

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.

Example

2*Pi/(4+(Pi-2)^2) = 1.18478376776...

Mathematica

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

Prog

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

Crossrefs

Cf. A369104, A019669, A000796.

Sequence in context: A110233 A179260 A254246 * A254375 A359837 A019684

Adjacent sequences: A369100 A369101 A369102 * A369104 A369105 A369106

Keyword

nonn,cons

Author

Bence Bernáth, Jan 13 2024

Status

approved