A175990 - cp's OEIS frontend

A175990 Irregular triangle read by rows: t(n,m) = binomial(n-m-1,m+1) for 0 <= m <= floor((n-1)/2).

n	a(n)
2	1
3	2
4	0
5	3
6	1
7	4
8	3
9	0
10	5
11	6
12	1
13	6
14	10
15	4
16	0
17	7
18	15
19	10
20	1
21	8
22	21
23	20
24	5
25	0
26	9
27	28
28	35
29	15
30	1
31	10
32	36
33	56
34	35
35	6
36	0
37	11
38	45
39	84
40	70
41	21
42	1
43	12
44	55
45	120
46	126
47	56
48	7
49	0
50	13
51	66
52	165
53	210
54	126
55	28
56	1
57	14
58	78
59	220
60	330
61	252
62	84
63	8
64	0
65	15
66	91
67	286
68	495
69	462
70	210
71	36
72	1
73	16
74	105
75	364
76	715
77	792
78	462
79	120
80	9
81	0
82	17
83	120

[1, 2, 0, 3, 1, 4, 3, 0, 5, 6, 1, 6, 10, 4, 0, 7, 15, 10, 1, 8, 21, 20, 5, 0, 9, 28, 35, 15, 1, 10, 36, 56, 35, 6, 0, 11, 45, 84, 70, 21, 1, 12, 55, 120, 126, 56, 7, 0, 13, 66, 165, 210, 126, 28, 1, 14, 78, 220, 330, 252, 84, 8, 0, 15, 91, 286, 495, 462, 210, 36, 1, 16, 105, 364, 715, 792, 462, 120, 9, 0, 17, 120]

cp's OEIS Frontend

A175990 Irregular triangle read by rows: t(n,m) = binomial(n-m-1,m+1) for 0 <= m <= floor((n-1)/2).

Table of values

List of values

n	a(n)
2	1
3	2
4	0
5	3
6	1
7	4
8	3
9	0
10	5
11	6
12	1
13	6
14	10
15	4
16	0
17	7
18	15
19	10
20	1
21	8
22	21
23	20
24	5
25	0
26	9
27	28
28	35
29	15
30	1
31	10
32	36
33	56
34	35
35	6
36	0
37	11
38	45
39	84
40	70
41	21
42	1
43	12
44	55
45	120
46	126
47	56
48	7
49	0
50	13
51	66
52	165
53	210
54	126
55	28
56	1
57	14
58	78
59	220
60	330
61	252
62	84
63	8
64	0
65	15
66	91
67	286
68	495
69	462
70	210
71	36
72	1
73	16
74	105
75	364
76	715
77	792
78	462
79	120
80	9
81	0
82	17
83	120

n	a(n)
2	1
3	2
4	0
5	3
6	1
7	4
8	3
9	0
10	5
11	6
12	1
13	6
14	10
15	4
16	0
17	7
18	15
19	10
20	1
21	8
22	21
23	20
24	5
25	0
26	9
27	28
28	35
29	15
30	1
31	10
32	36
33	56
34	35
35	6
36	0
37	11
38	45
39	84
40	70
41	21
42	1
43	12
44	55
45	120
46	126
47	56
48	7
49	0
50	13
51	66
52	165
53	210
54	126
55	28
56	1
57	14
58	78
59	220
60	330
61	252
62	84
63	8
64	0
65	15
66	91
67	286
68	495
69	462
70	210
71	36
72	1
73	16
74	105
75	364
76	715
77	792
78	462
79	120
80	9
81	0
82	17
83	120

n	a(n)
2	1
3	2
4	0
5	3
6	1
7	4
8	3
9	0
10	5
11	6
12	1
13	6
14	10
15	4
16	0
17	7
18	15
19	10
20	1
21	8
22	21
23	20
24	5
25	0
26	9
27	28
28	35
29	15
30	1
31	10
32	36
33	56
34	35
35	6
36	0
37	11
38	45
39	84
40	70
41	21
42	1
43	12
44	55
45	120
46	126
47	56
48	7
49	0
50	13
51	66
52	165
53	210
54	126
55	28
56	1
57	14
58	78
59	220
60	330
61	252
62	84
63	8
64	0
65	15
66	91
67	286
68	495
69	462
70	210
71	36
72	1
73	16
74	105
75	364
76	715
77	792
78	462
79	120
80	9
81	0
82	17
83	120