A173279 - cp's OEIS frontend

A173279 Irregular triangle read by rows: M(n,k) = (n-2*k)!, k=0..floor(n/2).

n	a(n)
0	1
1	1
2	2
3	1
4	6
5	1
6	24
7	2
8	1
9	120
10	6
11	1
12	720
13	24
14	2
15	1
16	5040
17	120
18	6
19	1
20	40320
21	720
22	24
23	2
24	1
25	362880
26	5040
27	120
28	6
29	1
30	3628800
31	40320
32	720
33	24
34	2
35	1
36	39916800
37	362880
38	5040
39	120
40	6
41	1
42	479001600
43	3628800
44	40320
45	720
46	24
47	2
48	1
49	6227020800
50	39916800
51	362880
52	5040
53	120
54	6
55	1
56	87178291200

[1, 1, 2, 1, 6, 1, 24, 2, 1, 120, 6, 1, 720, 24, 2, 1, 5040, 120, 6, 1, 40320, 720, 24, 2, 1, 362880, 5040, 120, 6, 1, 3628800, 40320, 720, 24, 2, 1, 39916800, 362880, 5040, 120, 6, 1, 479001600, 3628800, 40320, 720, 24, 2, 1, 6227020800, 39916800, 362880, 5040, 120, 6, 1, 87178291200]

cp's OEIS Frontend

A173279 Irregular triangle read by rows: M(n,k) = (n-2*k)!, k=0..floor(n/2).

Table of values

List of values