A256095 - cp's OEIS frontend

A256095 Triangle of greatest common divisors of two triangular numbers (A000217).

n	a(n)
0	0
1	1
2	1
3	3
4	1
5	3
6	6
7	1
8	3
9	6
10	10
11	1
12	1
13	2
14	10
15	15
16	1
17	3
18	3
19	5
20	15
21	21
22	1
23	3
24	3
25	1
26	3
27	21
28	28
29	1
30	1
31	2
32	2
33	1
34	7
35	28
36	36
37	1
38	3
39	6
40	2
41	3
42	3
43	4
44	36
45	45
46	1
47	3
48	3
49	5
50	15
51	3
52	1
53	9
54	45
55	55
56	1
57	1
58	1
59	5
60	5
61	1
62	1
63	1
64	5
65	55
66	66
67	1
68	3
69	6
70	2
71	3
72	3
73	2
74	6
75	3
76	11
77	66
78	78
79	1
80	3
81	6
82	2
83	3
84	3
85	2
86	6
87	3
88	1
89	6
90	78
91	91
92	1
93	1
94	1
95	1
96	1
97	7
98	7
99	1
100	1
101	1
102	1
103	13
104	91
105	105
106	1
107	3
108	3
109	5
110	15
111	21
112	7
113	3
114	15
115	5
116	3
117	3
118	7
119	105

[0, 1, 1, 3, 1, 3, 6, 1, 3, 6, 10, 1, 1, 2, 10, 15, 1, 3, 3, 5, 15, 21, 1, 3, 3, 1, 3, 21, 28, 1, 1, 2, 2, 1, 7, 28, 36, 1, 3, 6, 2, 3, 3, 4, 36, 45, 1, 3, 3, 5, 15, 3, 1, 9, 45, 55, 1, 1, 1, 5, 5, 1, 1, 1, 5, 55, 66, 1, 3, 6, 2, 3, 3, 2, 6, 3, 11, 66, 78, 1, 3, 6, 2, 3, 3, 2, 6, 3, 1, 6, 78, 91, 1, 1, 1, 1, 1, 7, 7, 1, 1, 1, 1, 13, 91, 105, 1, 3, 3, 5, 15, 21, 7, 3, 15, 5, 3, 3, 7, 105]

cp's OEIS Frontend

A256095 Triangle of greatest common divisors of two triangular numbers (A000217).

Table of values

List of values

n	a(n)
0	0
1	1
2	1
3	3
4	1
5	3
6	6
7	1
8	3
9	6
10	10
11	1
12	1
13	2
14	10
15	15
16	1
17	3
18	3
19	5
20	15
21	21
22	1
23	3
24	3
25	1
26	3
27	21
28	28
29	1
30	1
31	2
32	2
33	1
34	7
35	28
36	36
37	1
38	3
39	6
40	2
41	3
42	3
43	4
44	36
45	45
46	1
47	3
48	3
49	5
50	15
51	3
52	1
53	9
54	45
55	55
56	1
57	1
58	1
59	5
60	5
61	1
62	1
63	1
64	5
65	55
66	66
67	1
68	3
69	6
70	2
71	3
72	3
73	2
74	6
75	3
76	11
77	66
78	78
79	1
80	3
81	6
82	2
83	3
84	3
85	2
86	6
87	3
88	1
89	6
90	78
91	91
92	1
93	1
94	1
95	1
96	1
97	7
98	7
99	1
100	1
101	1
102	1
103	13
104	91
105	105
106	1
107	3
108	3
109	5
110	15
111	21
112	7
113	3
114	15
115	5
116	3
117	3
118	7
119	105

n	a(n)
0	0
1	1
2	1
3	3
4	1
5	3
6	6
7	1
8	3
9	6
10	10
11	1
12	1
13	2
14	10
15	15
16	1
17	3
18	3
19	5
20	15
21	21
22	1
23	3
24	3
25	1
26	3
27	21
28	28
29	1
30	1
31	2
32	2
33	1
34	7
35	28
36	36
37	1
38	3
39	6
40	2
41	3
42	3
43	4
44	36
45	45
46	1
47	3
48	3
49	5
50	15
51	3
52	1
53	9
54	45
55	55
56	1
57	1
58	1
59	5
60	5
61	1
62	1
63	1
64	5
65	55
66	66
67	1
68	3
69	6
70	2
71	3
72	3
73	2
74	6
75	3
76	11
77	66
78	78
79	1
80	3
81	6
82	2
83	3
84	3
85	2
86	6
87	3
88	1
89	6
90	78
91	91
92	1
93	1
94	1
95	1
96	1
97	7
98	7
99	1
100	1
101	1
102	1
103	13
104	91
105	105
106	1
107	3
108	3
109	5
110	15
111	21
112	7
113	3
114	15
115	5
116	3
117	3
118	7
119	105

n	a(n)
0	0
1	1
2	1
3	3
4	1
5	3
6	6
7	1
8	3
9	6
10	10
11	1
12	1
13	2
14	10
15	15
16	1
17	3
18	3
19	5
20	15
21	21
22	1
23	3
24	3
25	1
26	3
27	21
28	28
29	1
30	1
31	2
32	2
33	1
34	7
35	28
36	36
37	1
38	3
39	6
40	2
41	3
42	3
43	4
44	36
45	45
46	1
47	3
48	3
49	5
50	15
51	3
52	1
53	9
54	45
55	55
56	1
57	1
58	1
59	5
60	5
61	1
62	1
63	1
64	5
65	55
66	66
67	1
68	3
69	6
70	2
71	3
72	3
73	2
74	6
75	3
76	11
77	66
78	78
79	1
80	3
81	6
82	2
83	3
84	3
85	2
86	6
87	3
88	1
89	6
90	78
91	91
92	1
93	1
94	1
95	1
96	1
97	7
98	7
99	1
100	1
101	1
102	1
103	13
104	91
105	105
106	1
107	3
108	3
109	5
110	15
111	21
112	7
113	3
114	15
115	5
116	3
117	3
118	7
119	105