A127067 - cp's OEIS frontend

A127067 Define an array by d(m, 0) = 1, d(m, 1) = m; d(m, k) = (m - k + 1) d(m+1, k-1) - (k-1) (m+1) d(m+2, k-2). Sequence gives d(2,n).

n	a(n)
0	1
1	2
2	0
3	-24
4	-60
5	720
6	5040
7	-40320
8	-589680
9	3628800
10	99792000
11	-479001600
12	-23740516800
13	87178291200
14	7682586912000
15	-20922789888000
16	-3281772285792000
17	6402373705728000
18	1801868049805824000
19	-2432902008176640000
20	-1241948957556827520000
21	1124000727777607680000

[1, 2, 0, -24, -60, 720, 5040, -40320, -589680, 3628800, 99792000, -479001600, -23740516800, 87178291200, 7682586912000, -20922789888000, -3281772285792000, 6402373705728000, 1801868049805824000, -2432902008176640000, -1241948957556827520000, 1124000727777607680000]

cp's OEIS Frontend

A127067 Define an array by d(m, 0) = 1, d(m, 1) = m; d(m, k) = (m - k + 1) d(m+1, k-1) - (k-1) (m+1) d(m+2, k-2). Sequence gives d(2,n).

Table of values

List of values