A296559 - cp's OEIS frontend

A296559 Triangle read by rows: T(n,k) is the number of compositions of n having k parts equal to 1 or 2 (0<=k<=n).

n	a(n)
0	1
1	0
2	1
3	0
4	1
5	1
6	1
7	0
8	2
9	1
10	1
11	2
12	1
13	3
14	1
15	1
16	4
17	3
18	3
19	4
20	1
21	2
22	4
23	9
24	5
25	6
26	5
27	1
28	3
29	7
30	12
31	16
32	9
33	10
34	6
35	1
36	4
37	13
38	18
39	28
40	26
41	16
42	15
43	7
44	1
45	6
46	19
47	36
48	42
49	55
50	41
51	27
52	21
53	8
54	1
55	9
56	29
57	60
58	82
59	90
60	97
61	64
62	43
63	28
64	9
65	1
66	13
67	47
68	94
69	152
70	170
71	177
72	160
73	99
74	65
75	36
76	10
77	1
78	19
79	73
80	158
81	252
82	335
83	333
84	323
85	253
86	151
87	94
88	45
89	11
90	1

[1, 0, 1, 0, 1, 1, 1, 0, 2, 1, 1, 2, 1, 3, 1, 1, 4, 3, 3, 4, 1, 2, 4, 9, 5, 6, 5, 1, 3, 7, 12, 16, 9, 10, 6, 1, 4, 13, 18, 28, 26, 16, 15, 7, 1, 6, 19, 36, 42, 55, 41, 27, 21, 8, 1, 9, 29, 60, 82, 90, 97, 64, 43, 28, 9, 1, 13, 47, 94, 152, 170, 177, 160, 99, 65, 36, 10, 1, 19, 73, 158, 252, 335, 333, 323, 253, 151, 94, 45, 11, 1]

cp's OEIS Frontend

A296559 Triangle read by rows: T(n,k) is the number of compositions of n having k parts equal to 1 or 2 (0<=k<=n).

Table of values

List of values

n	a(n)
0	1
1	0
2	1
3	0
4	1
5	1
6	1
7	0
8	2
9	1
10	1
11	2
12	1
13	3
14	1
15	1
16	4
17	3
18	3
19	4
20	1
21	2
22	4
23	9
24	5
25	6
26	5
27	1
28	3
29	7
30	12
31	16
32	9
33	10
34	6
35	1
36	4
37	13
38	18
39	28
40	26
41	16
42	15
43	7
44	1
45	6
46	19
47	36
48	42
49	55
50	41
51	27
52	21
53	8
54	1
55	9
56	29
57	60
58	82
59	90
60	97
61	64
62	43
63	28
64	9
65	1
66	13
67	47
68	94
69	152
70	170
71	177
72	160
73	99
74	65
75	36
76	10
77	1
78	19
79	73
80	158
81	252
82	335
83	333
84	323
85	253
86	151
87	94
88	45
89	11
90	1

n	a(n)
0	1
1	0
2	1
3	0
4	1
5	1
6	1
7	0
8	2
9	1
10	1
11	2
12	1
13	3
14	1
15	1
16	4
17	3
18	3
19	4
20	1
21	2
22	4
23	9
24	5
25	6
26	5
27	1
28	3
29	7
30	12
31	16
32	9
33	10
34	6
35	1
36	4
37	13
38	18
39	28
40	26
41	16
42	15
43	7
44	1
45	6
46	19
47	36
48	42
49	55
50	41
51	27
52	21
53	8
54	1
55	9
56	29
57	60
58	82
59	90
60	97
61	64
62	43
63	28
64	9
65	1
66	13
67	47
68	94
69	152
70	170
71	177
72	160
73	99
74	65
75	36
76	10
77	1
78	19
79	73
80	158
81	252
82	335
83	333
84	323
85	253
86	151
87	94
88	45
89	11
90	1

n	a(n)
0	1
1	0
2	1
3	0
4	1
5	1
6	1
7	0
8	2
9	1
10	1
11	2
12	1
13	3
14	1
15	1
16	4
17	3
18	3
19	4
20	1
21	2
22	4
23	9
24	5
25	6
26	5
27	1
28	3
29	7
30	12
31	16
32	9
33	10
34	6
35	1
36	4
37	13
38	18
39	28
40	26
41	16
42	15
43	7
44	1
45	6
46	19
47	36
48	42
49	55
50	41
51	27
52	21
53	8
54	1
55	9
56	29
57	60
58	82
59	90
60	97
61	64
62	43
63	28
64	9
65	1
66	13
67	47
68	94
69	152
70	170
71	177
72	160
73	99
74	65
75	36
76	10
77	1
78	19
79	73
80	158
81	252
82	335
83	333
84	323
85	253
86	151
87	94
88	45
89	11
90	1