A330190 - cp's OEIS frontend

A330190 Symmetric matrix read by antidiagonals: f(i,j) = 1 + gcd(f(i-1,j), f(i,j-1)), where f(1,j) and f(i,1) are 1.

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

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

cp's OEIS Frontend

A330190 Symmetric matrix read by antidiagonals: f(i,j) = 1 + gcd(f(i-1,j), f(i,j-1)), where f(1,j) and f(i,1) are 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	2
9	2
10	1
11	1
12	2
13	3
14	2
15	1
16	1
17	2
18	2
19	2
20	2
21	1
22	1
23	2
24	3
25	3
26	3
27	2
28	1
29	1
30	2
31	2
32	4
33	4
34	2
35	2
36	1
37	1
38	2
39	3
40	3
41	5
42	3
43	3
44	2
45	1
46	1
47	2
48	2
49	4
50	2
51	2
52	4
53	2
54	2
55	1
56	1
57	2
58	3
59	3
60	3
61	3
62	3
63	3
64	3
65	2
66	1
67	1
68	2
69	2
70	4
71	4
72	4
73	4
74	4
75	4
76	2
77	2
78	1
79	1
80	2
81	3
82	3
83	5
84	5
85	5
86	5
87	5
88	3
89	3
90	2
91	1

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

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