Table 1: Nonrelativistic energies of the states for the beryllium atom (in a.u.).

This work Hibberta Weissb 3P −14.56637 −14.5184 −14.51844 3P −14.39839 −14.3510 −14.35106 3P −14.36248   −14.31530

aReference [1]. bReference [2].