A011973 - cp's OEIS frontend

A011973 Irregular triangle read by rows: T(n,k) = binomial(n-k, k), n >= 0, 0 <= k <= floor(n/2); or, coefficients of (one version of) Fibonacci polynomials.

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

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

cp's OEIS Frontend

A011973 Irregular triangle read by rows: T(n,k) = binomial(n-k, k), n >= 0, 0 <= k <= floor(n/2); or, coefficients of (one version of) Fibonacci polynomials.

Table of values

List of values

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

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

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