A136527 - cp's OEIS frontend

A136527 Triangle read by rows: T(n,k) = greatest common divisor of n-th and k-th composite number, 1<=k<=n.

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

[4, 2, 6, 4, 2, 8, 1, 3, 1, 9, 2, 2, 2, 1, 10, 4, 6, 4, 3, 2, 12, 2, 2, 2, 1, 2, 2, 14, 1, 3, 1, 3, 5, 3, 1, 15, 4, 2, 8, 1, 2, 4, 2, 1, 16, 2, 6, 2, 9, 2, 6, 2, 3, 2, 18, 4, 2, 4, 1, 10, 4, 2, 5, 4, 2, 20, 1, 3, 1, 3, 1, 3, 7, 3, 1, 3, 1, 21, 2, 2, 2, 1, 2, 2, 2, 1, 2, 2, 2, 1, 22, 4, 6, 8, 3, 2, 12, 2, 3, 8, 6, 4, 3, 2, 24]

cp's OEIS Frontend

A136527 Triangle read by rows: T(n,k) = greatest common divisor of n-th and k-th composite number, 1<=k<=n.

Table of values

List of values

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

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

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