A134399 - cp's OEIS frontend

A134399 Matrix product of Binomial triangle A007318 and triangle with (1, 1, 2, 3, 4, 5, ...) in the main diagonal and the rest zeros.

n	a(n)
0	1
1	1
2	1
3	1
4	2
5	2
6	1
7	3
8	6
9	3
10	1
11	4
12	12
13	12
14	4
15	1
16	5
17	20
18	30
19	20
20	5
21	1
22	6
23	30
24	60
25	60
26	30
27	6
28	1
29	7
30	42
31	105
32	140
33	105
34	42
35	7
36	1
37	8
38	56
39	168
40	280
41	280
42	168
43	56
44	8
45	1
46	9
47	72
48	252
49	504
50	630
51	504
52	252
53	72
54	9

[1, 1, 1, 1, 2, 2, 1, 3, 6, 3, 1, 4, 12, 12, 4, 1, 5, 20, 30, 20, 5, 1, 6, 30, 60, 60, 30, 6, 1, 7, 42, 105, 140, 105, 42, 7, 1, 8, 56, 168, 280, 280, 168, 56, 8, 1, 9, 72, 252, 504, 630, 504, 252, 72, 9]

cp's OEIS Frontend

A134399 Matrix product of Binomial triangle A007318 and triangle with (1, 1, 2, 3, 4, 5, ...) in the main diagonal and the rest zeros.

Table of values

List of values

n	a(n)
0	1
1	1
2	1
3	1
4	2
5	2
6	1
7	3
8	6
9	3
10	1
11	4
12	12
13	12
14	4
15	1
16	5
17	20
18	30
19	20
20	5
21	1
22	6
23	30
24	60
25	60
26	30
27	6
28	1
29	7
30	42
31	105
32	140
33	105
34	42
35	7
36	1
37	8
38	56
39	168
40	280
41	280
42	168
43	56
44	8
45	1
46	9
47	72
48	252
49	504
50	630
51	504
52	252
53	72
54	9

n	a(n)
0	1
1	1
2	1
3	1
4	2
5	2
6	1
7	3
8	6
9	3
10	1
11	4
12	12
13	12
14	4
15	1
16	5
17	20
18	30
19	20
20	5
21	1
22	6
23	30
24	60
25	60
26	30
27	6
28	1
29	7
30	42
31	105
32	140
33	105
34	42
35	7
36	1
37	8
38	56
39	168
40	280
41	280
42	168
43	56
44	8
45	1
46	9
47	72
48	252
49	504
50	630
51	504
52	252
53	72
54	9

n	a(n)
0	1
1	1
2	1
3	1
4	2
5	2
6	1
7	3
8	6
9	3
10	1
11	4
12	12
13	12
14	4
15	1
16	5
17	20
18	30
19	20
20	5
21	1
22	6
23	30
24	60
25	60
26	30
27	6
28	1
29	7
30	42
31	105
32	140
33	105
34	42
35	7
36	1
37	8
38	56
39	168
40	280
41	280
42	168
43	56
44	8
45	1
46	9
47	72
48	252
49	504
50	630
51	504
52	252
53	72
54	9