A138553 - cp's OEIS frontend

A138553 Table read by rows: T(n,k) is the number of divisors of k that are <= n.

n	a(n)
1	1
2	1
3	2
4	1
5	2
6	2
7	2
8	1
9	3
10	1
11	2
12	2
13	3
14	1
15	3
16	1
17	3
18	2
19	2
20	1
21	4
22	1
23	2
24	2
25	3
26	2
27	3
28	1
29	3
30	2
31	3
32	1
33	4
34	1
35	2
36	3
37	3
38	1
39	3
40	1
41	4
42	2
43	2
44	1
45	4
46	2
47	2
48	2
49	3
50	1
51	4
52	1
53	3
54	2
55	2
56	2
57	4
58	1
59	2
60	2
61	4
62	1
63	3
64	1
65	3
66	3
67	2
68	1
69	4
70	1
71	3
72	2
73	3
74	1
75	3
76	2
77	3
78	2
79	2
80	1
81	5
82	1
83	2
84	2
85	3
86	2
87	4
88	1
89	3
90	2
91	3
92	1
93	5
94	1
95	2
96	3
97	3
98	1
99	4
100	1
101	4
102	2
103	2
104	1
105	5

[1, 1, 2, 1, 2, 2, 2, 1, 3, 1, 2, 2, 3, 1, 3, 1, 3, 2, 2, 1, 4, 1, 2, 2, 3, 2, 3, 1, 3, 2, 3, 1, 4, 1, 2, 3, 3, 1, 3, 1, 4, 2, 2, 1, 4, 2, 2, 2, 3, 1, 4, 1, 3, 2, 2, 2, 4, 1, 2, 2, 4, 1, 3, 1, 3, 3, 2, 1, 4, 1, 3, 2, 3, 1, 3, 2, 3, 2, 2, 1, 5, 1, 2, 2, 3, 2, 4, 1, 3, 2, 3, 1, 5, 1, 2, 3, 3, 1, 4, 1, 4, 2, 2, 1, 5]

cp's OEIS Frontend

A138553 Table read by rows: T(n,k) is the number of divisors of k that are <= n.

Table of values

List of values

n	a(n)
1	1
2	1
3	2
4	1
5	2
6	2
7	2
8	1
9	3
10	1
11	2
12	2
13	3
14	1
15	3
16	1
17	3
18	2
19	2
20	1
21	4
22	1
23	2
24	2
25	3
26	2
27	3
28	1
29	3
30	2
31	3
32	1
33	4
34	1
35	2
36	3
37	3
38	1
39	3
40	1
41	4
42	2
43	2
44	1
45	4
46	2
47	2
48	2
49	3
50	1
51	4
52	1
53	3
54	2
55	2
56	2
57	4
58	1
59	2
60	2
61	4
62	1
63	3
64	1
65	3
66	3
67	2
68	1
69	4
70	1
71	3
72	2
73	3
74	1
75	3
76	2
77	3
78	2
79	2
80	1
81	5
82	1
83	2
84	2
85	3
86	2
87	4
88	1
89	3
90	2
91	3
92	1
93	5
94	1
95	2
96	3
97	3
98	1
99	4
100	1
101	4
102	2
103	2
104	1
105	5

n	a(n)
1	1
2	1
3	2
4	1
5	2
6	2
7	2
8	1
9	3
10	1
11	2
12	2
13	3
14	1
15	3
16	1
17	3
18	2
19	2
20	1
21	4
22	1
23	2
24	2
25	3
26	2
27	3
28	1
29	3
30	2
31	3
32	1
33	4
34	1
35	2
36	3
37	3
38	1
39	3
40	1
41	4
42	2
43	2
44	1
45	4
46	2
47	2
48	2
49	3
50	1
51	4
52	1
53	3
54	2
55	2
56	2
57	4
58	1
59	2
60	2
61	4
62	1
63	3
64	1
65	3
66	3
67	2
68	1
69	4
70	1
71	3
72	2
73	3
74	1
75	3
76	2
77	3
78	2
79	2
80	1
81	5
82	1
83	2
84	2
85	3
86	2
87	4
88	1
89	3
90	2
91	3
92	1
93	5
94	1
95	2
96	3
97	3
98	1
99	4
100	1
101	4
102	2
103	2
104	1
105	5

n	a(n)
1	1
2	1
3	2
4	1
5	2
6	2
7	2
8	1
9	3
10	1
11	2
12	2
13	3
14	1
15	3
16	1
17	3
18	2
19	2
20	1
21	4
22	1
23	2
24	2
25	3
26	2
27	3
28	1
29	3
30	2
31	3
32	1
33	4
34	1
35	2
36	3
37	3
38	1
39	3
40	1
41	4
42	2
43	2
44	1
45	4
46	2
47	2
48	2
49	3
50	1
51	4
52	1
53	3
54	2
55	2
56	2
57	4
58	1
59	2
60	2
61	4
62	1
63	3
64	1
65	3
66	3
67	2
68	1
69	4
70	1
71	3
72	2
73	3
74	1
75	3
76	2
77	3
78	2
79	2
80	1
81	5
82	1
83	2
84	2
85	3
86	2
87	4
88	1
89	3
90	2
91	3
92	1
93	5
94	1
95	2
96	3
97	3
98	1
99	4
100	1
101	4
102	2
103	2
104	1
105	5