A108350 - cp's OEIS frontend

A108350 Number triangle T(n,k) = Sum_{j=0..n-k} binomial(k,j)binomial(n-j,k)((j+1) mod 2).

n	a(n)
0	1
1	1
2	1
3	1
4	2
5	1
6	1
7	3
8	3
9	1
10	1
11	4
12	7
13	4
14	1
15	1
16	5
17	13
18	13
19	5
20	1
21	1
22	6
23	21
24	32
25	21
26	6
27	1
28	1
29	7
30	31
31	65
32	65
33	31
34	7
35	1
36	1
37	8
38	43
39	116
40	161
41	116
42	43
43	8
44	1
45	1
46	9
47	57
48	189
49	341
50	341
51	189
52	57
53	9
54	1
55	1
56	10
57	73
58	288
59	645
60	842
61	645
62	288
63	73
64	10
65	1
66	1
67	11
68	91
69	417
70	1121
71	1827
72	1827
73	1121
74	417
75	91

[1, 1, 1, 1, 2, 1, 1, 3, 3, 1, 1, 4, 7, 4, 1, 1, 5, 13, 13, 5, 1, 1, 6, 21, 32, 21, 6, 1, 1, 7, 31, 65, 65, 31, 7, 1, 1, 8, 43, 116, 161, 116, 43, 8, 1, 1, 9, 57, 189, 341, 341, 189, 57, 9, 1, 1, 10, 73, 288, 645, 842, 645, 288, 73, 10, 1, 1, 11, 91, 417, 1121, 1827, 1827, 1121, 417, 91]

cp's OEIS Frontend

A108350 Number triangle T(n,k) = Sum_{j=0..n-k} binomial(k,j)binomial(n-j,k)((j+1) mod 2).

Table of values

List of values

cp's OEIS Frontend

A108350 Number triangle T(n,k) = Sum_{j=0..n-k} binomial(k,j)*binomial(n-j,k)*((j+1) mod 2).

Table of values

List of values

A108350 Number triangle T(n,k) = Sum_{j=0..n-k} binomial(k,j)binomial(n-j,k)((j+1) mod 2).