k

$l=0$

$l=1$

$l=2$

$l=3$

$l=4$

$l=5$

$l=6$

$l=7$

$l=8$

$l=9$

${\displaystyle {\sum }_{l=0}^k{E}_0\left(k,l\right)}$

0

1

0

0

0

0

0

0

0

0

0

1 = 0!

1

1

0

0

0

0

0

0

0

0

0

1 = 0!

2

1

0

0

0

0

0

0

0

0

0

1 = 0!

$⋮$

$⋮$

$⋮$

$⋮$

$⋮$

$⋮$

$⋮$

$⋮$

$⋮$

$⋮$

$⋮$

$⋮$