A117919 - cp's OEIS frontend

A117919 Triangle read by rows: T(n, k) = 2^floor((k-1)/2)*binomial(n-1, k-1).

n	a(n)
1	1
2	1
3	1
4	1
5	2
6	2
7	1
8	3
9	6
10	2
11	1
12	4
13	12
14	8
15	4
16	1
17	5
18	20
19	20
20	20
21	4
22	1
23	6
24	30
25	40
26	60
27	24
28	8
29	1
30	7
31	42
32	70
33	140
34	84
35	56
36	8
37	1
38	8
39	56
40	112
41	280
42	224
43	224
44	64
45	16
46	1
47	9
48	72
49	168
50	504
51	504
52	672
53	288
54	144
55	16
56	1
57	10
58	90
59	240
60	840
61	1008
62	1680
63	960
64	720
65	160
66	32
67	1
68	11
69	110
70	330
71	1320
72	1848
73	3696
74	2640
75	2640
76	880
77	352
78	32

[1, 1, 1, 1, 2, 2, 1, 3, 6, 2, 1, 4, 12, 8, 4, 1, 5, 20, 20, 20, 4, 1, 6, 30, 40, 60, 24, 8, 1, 7, 42, 70, 140, 84, 56, 8, 1, 8, 56, 112, 280, 224, 224, 64, 16, 1, 9, 72, 168, 504, 504, 672, 288, 144, 16, 1, 10, 90, 240, 840, 1008, 1680, 960, 720, 160, 32, 1, 11, 110, 330, 1320, 1848, 3696, 2640, 2640, 880, 352, 32]

cp's OEIS Frontend

A117919 Triangle read by rows: T(n, k) = 2^floor((k-1)/2)*binomial(n-1, k-1).

Table of values

List of values