A127137 - cp's OEIS frontend

A127137 Define an array by Q(m, 0) = 1, Q(m, 1) = 1; Q(m, 2k) = (m - 2k + 1)Q(m+1, 2k-1) - (2k-1)Q(m+2, 2k-2), mQ(m, 2k+1) = (m - 2k)Q(m+1, 2k) - 2k(m+1)*Q(m+2, 2k-1). Sequence gives Q(0,n).

n	a(n)
0	1
1	1
2	-2
3	-5
4	12
5	43
6	-120
7	-531
8	1680
9	8601
10	-30240
11	-172965
12	665280
13	4161555
14	-17297280
15	-116658675
16	518918400
17	3735104625
18	-17643225600
19	-134498225925
20	670442572800
21	5380583766075
22	-28158588057600
23	-236759435017875
24	1295295050649600
25	11364769115001225
26	-64764752532480000

[1, 1, -2, -5, 12, 43, -120, -531, 1680, 8601, -30240, -172965, 665280, 4161555, -17297280, -116658675, 518918400, 3735104625, -17643225600, -134498225925, 670442572800, 5380583766075, -28158588057600, -236759435017875, 1295295050649600, 11364769115001225, -64764752532480000]

cp's OEIS Frontend

A127137 Define an array by Q(m, 0) = 1, Q(m, 1) = 1; Q(m, 2k) = (m - 2k + 1)Q(m+1, 2k-1) - (2k-1)Q(m+2, 2k-2), mQ(m, 2k+1) = (m - 2k)Q(m+1, 2k) - 2k(m+1)*Q(m+2, 2k-1). Sequence gives Q(0,n).

Table of values

List of values

cp's OEIS Frontend

A127137 Define an array by Q(m, 0) = 1, Q(m, 1) = 1; Q(m, 2k) = (m - 2k + 1)*Q(m+1, 2k-1) - (2k-1)*Q(m+2, 2k-2), m*Q(m, 2k+1) = (m - 2k)*Q(m+1, 2k) - 2k(m+1)*Q(m+2, 2k-1). Sequence gives Q(0,n).

Table of values

List of values

A127137 Define an array by Q(m, 0) = 1, Q(m, 1) = 1; Q(m, 2k) = (m - 2k + 1)Q(m+1, 2k-1) - (2k-1)Q(m+2, 2k-2), mQ(m, 2k+1) = (m - 2k)Q(m+1, 2k) - 2k(m+1)*Q(m+2, 2k-1). Sequence gives Q(0,n).