system
hydrogen
atom
harmonic
oscillator
exponential
parameter
α
0
.
5
number
of
basis
functions
4
⋮
energy
E
1
=
-
0
.
5000
E
2
=
-
0
.
1250
E
3
=
-
0
.
0556
E
4
=
-
0
.
0313
E
5
=
-
0
.
0200
E
6
=
-
0
.
0139
E
7
=
-
0
.
0102
exact
variational
-
0
.
4032
-
0
.
1032
-
0
.
0441
-
0
.
0227
