# [1] z, [2] chi(z) (Mpc/h)
0.000000000000000000e+00 0.000000000000000000e+00
1.000000000000000000e+00 2.265688469419004832e+03
2.000000000000000000e+00 3.552025213618237103e+03
3.000000000000000000e+00 4.365269918649795727e+03
4.000000000000000000e+00 4.931431444916223882e+03
5.000000000000000000e+00 5.352957219062010154e+03
