A321627 - cp's OEIS frontend

A321627 The Riordan square of the double factorial of odd numbers. Triangle T(n, k), 0 <= k <= n, read by rows.

n	a(n)
0	1
1	1
2	1
3	3
4	4
5	1
6	15
7	21
8	7
9	1
10	105
11	144
12	48
13	10
14	1
15	945
16	1245
17	372
18	84
19	13
20	1
21	10395
22	13140
23	3357
24	726
25	129
26	16
27	1
28	135135
29	164745
30	35415
31	6873
32	1233
33	183
34	19
35	1
36	2027025
37	2399040
38	434520
39	73116
40	12306
41	1920
42	246
43	22
44	1

[1, 1, 1, 3, 4, 1, 15, 21, 7, 1, 105, 144, 48, 10, 1, 945, 1245, 372, 84, 13, 1, 10395, 13140, 3357, 726, 129, 16, 1, 135135, 164745, 35415, 6873, 1233, 183, 19, 1, 2027025, 2399040, 434520, 73116, 12306, 1920, 246, 22, 1]

cp's OEIS Frontend

A321627 The Riordan square of the double factorial of odd numbers. Triangle T(n, k), 0 <= k <= n, read by rows.

Table of values

List of values