A126962 - cp's OEIS frontend

A126962 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(1,n).

n	a(n)
0	1
1	1
2	-2
3	-12
4	24
5	420
6	-720
7	-30240
8	40320
9	3764880
10	-3628800
11	-728481600
12	479001600
13	203545742400
14	-87178291200
15	-77806624896000
16	20922789888000
17	39045031657632000
18	-6402373705728000
19	-24904933604014464000
20	2432902008176640000
21	19678195269815322240000
22	-1124000727777607680000

[1, 1, -2, -12, 24, 420, -720, -30240, 40320, 3764880, -3628800, -728481600, 479001600, 203545742400, -87178291200, -77806624896000, 20922789888000, 39045031657632000, -6402373705728000, -24904933604014464000, 2432902008176640000, 19678195269815322240000, -1124000727777607680000]

cp's OEIS Frontend

A126962 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(1,n).

Table of values

List of values