A143235 - cp's OEIS frontend

A143235 Triangle read by rows: T(n,k) = tau(n)*tau(k), the product of the number of divisors.

n	a(n)
1	1
2	2
3	4
4	2
5	4
6	4
7	3
8	6
9	6
10	9
11	2
12	4
13	4
14	6
15	4
16	4
17	8
18	8
19	12
20	8
21	16
22	2
23	4
24	4
25	6
26	4
27	8
28	4
29	4
30	8
31	8
32	12
33	8
34	16
35	8
36	16
37	3
38	6
39	6
40	9
41	6
42	12
43	6
44	12
45	9
46	4
47	8
48	8
49	12
50	8
51	16
52	8
53	16
54	12
55	16
56	2
57	4
58	4
59	6
60	4
61	8
62	4
63	8
64	6
65	8
66	4
67	6
68	12
69	12
70	18
71	12
72	24
73	12
74	24
75	18
76	24
77	12
78	36
79	2
80	4
81	4
82	6
83	4
84	8
85	4
86	8
87	6
88	8
89	4
90	12
91	4

[1, 2, 4, 2, 4, 4, 3, 6, 6, 9, 2, 4, 4, 6, 4, 4, 8, 8, 12, 8, 16, 2, 4, 4, 6, 4, 8, 4, 4, 8, 8, 12, 8, 16, 8, 16, 3, 6, 6, 9, 6, 12, 6, 12, 9, 4, 8, 8, 12, 8, 16, 8, 16, 12, 16, 2, 4, 4, 6, 4, 8, 4, 8, 6, 8, 4, 6, 12, 12, 18, 12, 24, 12, 24, 18, 24, 12, 36, 2, 4, 4, 6, 4, 8, 4, 8, 6, 8, 4, 12, 4]

cp's OEIS Frontend

A143235 Triangle read by rows: T(n,k) = tau(n)*tau(k), the product of the number of divisors.

Table of values

List of values

n	a(n)
1	1
2	2
3	4
4	2
5	4
6	4
7	3
8	6
9	6
10	9
11	2
12	4
13	4
14	6
15	4
16	4
17	8
18	8
19	12
20	8
21	16
22	2
23	4
24	4
25	6
26	4
27	8
28	4
29	4
30	8
31	8
32	12
33	8
34	16
35	8
36	16
37	3
38	6
39	6
40	9
41	6
42	12
43	6
44	12
45	9
46	4
47	8
48	8
49	12
50	8
51	16
52	8
53	16
54	12
55	16
56	2
57	4
58	4
59	6
60	4
61	8
62	4
63	8
64	6
65	8
66	4
67	6
68	12
69	12
70	18
71	12
72	24
73	12
74	24
75	18
76	24
77	12
78	36
79	2
80	4
81	4
82	6
83	4
84	8
85	4
86	8
87	6
88	8
89	4
90	12
91	4

n	a(n)
1	1
2	2
3	4
4	2
5	4
6	4
7	3
8	6
9	6
10	9
11	2
12	4
13	4
14	6
15	4
16	4
17	8
18	8
19	12
20	8
21	16
22	2
23	4
24	4
25	6
26	4
27	8
28	4
29	4
30	8
31	8
32	12
33	8
34	16
35	8
36	16
37	3
38	6
39	6
40	9
41	6
42	12
43	6
44	12
45	9
46	4
47	8
48	8
49	12
50	8
51	16
52	8
53	16
54	12
55	16
56	2
57	4
58	4
59	6
60	4
61	8
62	4
63	8
64	6
65	8
66	4
67	6
68	12
69	12
70	18
71	12
72	24
73	12
74	24
75	18
76	24
77	12
78	36
79	2
80	4
81	4
82	6
83	4
84	8
85	4
86	8
87	6
88	8
89	4
90	12
91	4

n	a(n)
1	1
2	2
3	4
4	2
5	4
6	4
7	3
8	6
9	6
10	9
11	2
12	4
13	4
14	6
15	4
16	4
17	8
18	8
19	12
20	8
21	16
22	2
23	4
24	4
25	6
26	4
27	8
28	4
29	4
30	8
31	8
32	12
33	8
34	16
35	8
36	16
37	3
38	6
39	6
40	9
41	6
42	12
43	6
44	12
45	9
46	4
47	8
48	8
49	12
50	8
51	16
52	8
53	16
54	12
55	16
56	2
57	4
58	4
59	6
60	4
61	8
62	4
63	8
64	6
65	8
66	4
67	6
68	12
69	12
70	18
71	12
72	24
73	12
74	24
75	18
76	24
77	12
78	36
79	2
80	4
81	4
82	6
83	4
84	8
85	4
86	8
87	6
88	8
89	4
90	12
91	4