A125605 - cp's OEIS frontend

A125605 Triangle read by rows: T(n,k) = (T(n-1,k-1) + T(n-1,k)) / gcd(T(n-1,k-1), T(n-1,k)).

n	a(n)
0	1
1	1
2	1
3	1
4	2
5	1
6	1
7	3
8	3
9	1
10	1
11	4
12	2
13	4
14	1
15	1
16	5
17	3
18	3
19	5
20	1
21	1
22	6
23	8
24	2
25	8
26	6
27	1
28	1
29	7
30	7
31	5
32	5
33	7
34	7
35	1
36	1
37	8
38	2
39	12
40	2
41	12
42	2
43	8
44	1
45	1
46	9
47	5
48	7
49	7
50	7
51	7
52	5
53	9
54	1
55	1
56	10
57	14
58	12
59	2
60	2
61	2
62	12
63	14
64	10
65	1
66	1
67	11
68	12
69	13
70	7
71	2
72	2
73	7
74	13
75	12
76	11
77	1
78	1
79	12
80	23
81	25
82	20
83	9
84	2
85	9
86	20
87	25
88	23
89	12
90	1
91	1
92	13

[1, 1, 1, 1, 2, 1, 1, 3, 3, 1, 1, 4, 2, 4, 1, 1, 5, 3, 3, 5, 1, 1, 6, 8, 2, 8, 6, 1, 1, 7, 7, 5, 5, 7, 7, 1, 1, 8, 2, 12, 2, 12, 2, 8, 1, 1, 9, 5, 7, 7, 7, 7, 5, 9, 1, 1, 10, 14, 12, 2, 2, 2, 12, 14, 10, 1, 1, 11, 12, 13, 7, 2, 2, 7, 13, 12, 11, 1, 1, 12, 23, 25, 20, 9, 2, 9, 20, 25, 23, 12, 1, 1, 13]

cp's OEIS Frontend

A125605 Triangle read by rows: T(n,k) = (T(n-1,k-1) + T(n-1,k)) / gcd(T(n-1,k-1), T(n-1,k)).

Table of values

List of values

n	a(n)
0	1
1	1
2	1
3	1
4	2
5	1
6	1
7	3
8	3
9	1
10	1
11	4
12	2
13	4
14	1
15	1
16	5
17	3
18	3
19	5
20	1
21	1
22	6
23	8
24	2
25	8
26	6
27	1
28	1
29	7
30	7
31	5
32	5
33	7
34	7
35	1
36	1
37	8
38	2
39	12
40	2
41	12
42	2
43	8
44	1
45	1
46	9
47	5
48	7
49	7
50	7
51	7
52	5
53	9
54	1
55	1
56	10
57	14
58	12
59	2
60	2
61	2
62	12
63	14
64	10
65	1
66	1
67	11
68	12
69	13
70	7
71	2
72	2
73	7
74	13
75	12
76	11
77	1
78	1
79	12
80	23
81	25
82	20
83	9
84	2
85	9
86	20
87	25
88	23
89	12
90	1
91	1
92	13

n	a(n)
0	1
1	1
2	1
3	1
4	2
5	1
6	1
7	3
8	3
9	1
10	1
11	4
12	2
13	4
14	1
15	1
16	5
17	3
18	3
19	5
20	1
21	1
22	6
23	8
24	2
25	8
26	6
27	1
28	1
29	7
30	7
31	5
32	5
33	7
34	7
35	1
36	1
37	8
38	2
39	12
40	2
41	12
42	2
43	8
44	1
45	1
46	9
47	5
48	7
49	7
50	7
51	7
52	5
53	9
54	1
55	1
56	10
57	14
58	12
59	2
60	2
61	2
62	12
63	14
64	10
65	1
66	1
67	11
68	12
69	13
70	7
71	2
72	2
73	7
74	13
75	12
76	11
77	1
78	1
79	12
80	23
81	25
82	20
83	9
84	2
85	9
86	20
87	25
88	23
89	12
90	1
91	1
92	13

n	a(n)
0	1
1	1
2	1
3	1
4	2
5	1
6	1
7	3
8	3
9	1
10	1
11	4
12	2
13	4
14	1
15	1
16	5
17	3
18	3
19	5
20	1
21	1
22	6
23	8
24	2
25	8
26	6
27	1
28	1
29	7
30	7
31	5
32	5
33	7
34	7
35	1
36	1
37	8
38	2
39	12
40	2
41	12
42	2
43	8
44	1
45	1
46	9
47	5
48	7
49	7
50	7
51	7
52	5
53	9
54	1
55	1
56	10
57	14
58	12
59	2
60	2
61	2
62	12
63	14
64	10
65	1
66	1
67	11
68	12
69	13
70	7
71	2
72	2
73	7
74	13
75	12
76	11
77	1
78	1
79	12
80	23
81	25
82	20
83	9
84	2
85	9
86	20
87	25
88	23
89	12
90	1
91	1
92	13