A224838 - cp's OEIS frontend

A224838 Triangle read by rows, obtained from triangle A011973 by reading that array from right to left along the irregular paths shown in the figure.

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

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

cp's OEIS Frontend

A224838 Triangle read by rows, obtained from triangle A011973 by reading that array from right to left along the irregular paths shown in the figure.

Table of values

List of values

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

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

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