A077478 - cp's OEIS frontend

A077478 Rectangular array R read by antidiagonals: R(i,j) is the number of integers k that divide both i and j (i >= 1, j >= 1).

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

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

cp's OEIS Frontend

A077478 Rectangular array R read by antidiagonals: R(i,j) is the number of integers k that divide both i and j (i >= 1, j >= 1).

Table of values

List of values

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

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

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