a n , k | n Math_356#

K 1 2 k

Expression for

K 1 2 k

k = 0

K 1 2

1

π e x 2 x 1 2

k = 1

K 1 2

1

2

π e x 2 x 1 2 ( 2 x + 1 )

k = 2

K 1 1 2

1

6

12

π e x 2 x 1 2 ( 12 x 2 + 6 x + 1 )

k = 3

K 2 1 2

1

12

60

120

π e x 2 x 1 2 ( 120 x 3 + 60 x 2 + 12 x + 1 )

k = 4

K 3 1 2

1

20

180

840

1680

π e x 2 x 1 2 ( 1680 x 4 + 840 x 3 + 180 x 2 + 12 x + 1 )

k = 5

K 4 1 2

1

30

420

3360

4120

30,240

π e x 2 x 1 2 ( 1680 x 4 + 840 x 3 + 180 x 2 + 12 x + 1 )

x 0

x 1

x 2

x 3

x 4

x 5

π e x 2 x 1 2 ( 30240 x 4 + 4120 x 4 + 33160 x 3 + 420 x 2 + 30 x + 1 )