A055801 - cp's OEIS frontend

A055801 Triangle T read by rows: T(i,0)=T(i,i)=1, T(i,j) = Sum_{k=1..floor(n/2)} T(i-2k, j-2k+1) for 1<=j<=i-1, where T(m,n) := 0 if m<0 or n<0.

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

[1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 2, 2, 1, 1, 1, 1, 2, 3, 3, 1, 1, 1, 1, 2, 3, 4, 3, 1, 1, 1, 1, 2, 3, 5, 6, 4, 1, 1, 1, 1, 2, 3, 5, 7, 7, 4, 1, 1, 1, 1, 2, 3, 5, 8, 11, 10, 5, 1, 1, 1, 1, 2, 3, 5, 8, 12, 14, 11, 5, 1, 1, 1, 1, 2, 3, 5, 8, 13, 19, 21, 15, 6, 1]

cp's OEIS Frontend

A055801 Triangle T read by rows: T(i,0)=T(i,i)=1, T(i,j) = Sum_{k=1..floor(n/2)} T(i-2k, j-2k+1) for 1<=j<=i-1, where T(m,n) := 0 if m<0 or n<0.

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

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

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