Energies and forces were calculated using PBE functional and cc-pvdz basis by psi4 (http://www.psicode.org/psi4manual/master/index.html). 

Energies are given in Hartrees, forces are given in Hartrees/Bohr

Generation of the molecules was performed in the following steps:

1) C atom was placed to x, y, z = 0, 0, 0
2) H atoms were placed randomly with uniform distribution within the sphere of radius 3 A around C atom
3) if distance between any two atoms was less than 0.5 A then configuraton was discarded 
4) if self consistent calculation did not converge within 500 iterations (5 times more than the default value) then configuration was discarded

File format is extended xyz format. 

The first step is to unpack archive with "gunzip -k methane.extxyz.gz".

After that one can read it, for example, using ASE package in python:

import ase.io
configurations = ase.io.read("methane.extxyz", index = "0:num_you_need")

energy_of_the_first_configuration = configurations[0].info["energy"]
forces_of_the_first_configuration = configurations[0].arrays["forces"]

energy_in_eV = energy_of_the_first_configuration * 27.211386245988
forces_in_eV_A = forces_of_the_first_configuration * 51.42208619083232

Ase allows to read .gz file directly with

configurations = ase.io.read('methane.extxyz.gz', index = "0:num_you_need")

but in this case one can observe performance issues, and, thus, this way is not recommended.