A221531 - cp's OEIS frontend

A221531 Triangle read by rows: T(n,k) = A000005(n-k+1)*A000041(k-1), n>=1, k>=1.

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

[1, 2, 1, 2, 2, 2, 3, 2, 4, 3, 2, 3, 4, 6, 5, 4, 2, 6, 6, 10, 7, 2, 4, 4, 9, 10, 14, 11, 4, 2, 8, 6, 15, 14, 22, 15, 3, 4, 4, 12, 10, 21, 22, 30, 22, 4, 3, 8, 6, 20, 14, 33, 30, 44, 30, 2, 4, 6, 12, 10, 28, 22, 45, 44, 60, 42, 6, 2, 8, 9, 20, 14, 44, 30, 66, 60, 84, 56]

cp's OEIS Frontend

A221531 Triangle read by rows: T(n,k) = A000005(n-k+1)*A000041(k-1), n>=1, k>=1.

Table of values

List of values

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

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

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