A131268 - cp's OEIS frontend

A131268 Triangle read by rows: T(n,k) = 2*binomial(n-floor((k+1)/2),floor(k/2)) - 1, 0<=k<=n.

n	a(n)
0	1
1	1
2	1
3	1
4	1
5	1
6	1
7	1
8	3
9	1
10	1
11	1
12	5
13	3
14	1
15	1
16	1
17	7
18	5
19	5
20	1
21	1
22	1
23	9
24	7
25	11
26	5
27	1
28	1
29	1
30	11
31	9
32	19
33	11
34	7
35	1
36	1
37	1
38	13
39	11
40	29
41	19
42	19
43	7
44	1
45	1
46	1
47	15
48	13
49	41
50	29
51	39
52	19
53	9
54	1
55	1
56	1
57	17
58	15
59	55
60	41
61	69
62	39
63	29
64	9
65	1
66	1
67	1
68	19
69	17
70	71
71	55
72	111
73	69
74	69
75	29
76	11
77	1
78	1
79	1
80	21
81	19
82	89
83	71
84	167
85	111
86	139
87	69
88	41
89	11
90	1

[1, 1, 1, 1, 1, 1, 1, 1, 3, 1, 1, 1, 5, 3, 1, 1, 1, 7, 5, 5, 1, 1, 1, 9, 7, 11, 5, 1, 1, 1, 11, 9, 19, 11, 7, 1, 1, 1, 13, 11, 29, 19, 19, 7, 1, 1, 1, 15, 13, 41, 29, 39, 19, 9, 1, 1, 1, 17, 15, 55, 41, 69, 39, 29, 9, 1, 1, 1, 19, 17, 71, 55, 111, 69, 69, 29, 11, 1, 1, 1, 21, 19, 89, 71, 167, 111, 139, 69, 41, 11, 1]

cp's OEIS Frontend

A131268 Triangle read by rows: T(n,k) = 2*binomial(n-floor((k+1)/2),floor(k/2)) - 1, 0<=k<=n.

Table of values

List of values

n	a(n)
0	1
1	1
2	1
3	1
4	1
5	1
6	1
7	1
8	3
9	1
10	1
11	1
12	5
13	3
14	1
15	1
16	1
17	7
18	5
19	5
20	1
21	1
22	1
23	9
24	7
25	11
26	5
27	1
28	1
29	1
30	11
31	9
32	19
33	11
34	7
35	1
36	1
37	1
38	13
39	11
40	29
41	19
42	19
43	7
44	1
45	1
46	1
47	15
48	13
49	41
50	29
51	39
52	19
53	9
54	1
55	1
56	1
57	17
58	15
59	55
60	41
61	69
62	39
63	29
64	9
65	1
66	1
67	1
68	19
69	17
70	71
71	55
72	111
73	69
74	69
75	29
76	11
77	1
78	1
79	1
80	21
81	19
82	89
83	71
84	167
85	111
86	139
87	69
88	41
89	11
90	1

n	a(n)
0	1
1	1
2	1
3	1
4	1
5	1
6	1
7	1
8	3
9	1
10	1
11	1
12	5
13	3
14	1
15	1
16	1
17	7
18	5
19	5
20	1
21	1
22	1
23	9
24	7
25	11
26	5
27	1
28	1
29	1
30	11
31	9
32	19
33	11
34	7
35	1
36	1
37	1
38	13
39	11
40	29
41	19
42	19
43	7
44	1
45	1
46	1
47	15
48	13
49	41
50	29
51	39
52	19
53	9
54	1
55	1
56	1
57	17
58	15
59	55
60	41
61	69
62	39
63	29
64	9
65	1
66	1
67	1
68	19
69	17
70	71
71	55
72	111
73	69
74	69
75	29
76	11
77	1
78	1
79	1
80	21
81	19
82	89
83	71
84	167
85	111
86	139
87	69
88	41
89	11
90	1

n	a(n)
0	1
1	1
2	1
3	1
4	1
5	1
6	1
7	1
8	3
9	1
10	1
11	1
12	5
13	3
14	1
15	1
16	1
17	7
18	5
19	5
20	1
21	1
22	1
23	9
24	7
25	11
26	5
27	1
28	1
29	1
30	11
31	9
32	19
33	11
34	7
35	1
36	1
37	1
38	13
39	11
40	29
41	19
42	19
43	7
44	1
45	1
46	1
47	15
48	13
49	41
50	29
51	39
52	19
53	9
54	1
55	1
56	1
57	17
58	15
59	55
60	41
61	69
62	39
63	29
64	9
65	1
66	1
67	1
68	19
69	17
70	71
71	55
72	111
73	69
74	69
75	29
76	11
77	1
78	1
79	1
80	21
81	19
82	89
83	71
84	167
85	111
86	139
87	69
88	41
89	11
90	1