A181803 - cp's OEIS frontend

A181803 Triangle read by rows: T(n,k) is the k-th smallest divisor d of n such that n sets a record for the number of its divisors that are multiples of d.

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

[1, 1, 2, 3, 1, 2, 4, 5, 1, 3, 6, 7, 2, 4, 8, 9, 5, 10, 11, 1, 2, 3, 6, 12, 13, 7, 14, 15, 4, 8, 16, 17, 3, 9, 18, 19, 5, 10, 20, 21, 11, 22, 23, 1, 2, 4, 6, 12, 24, 25, 13, 26, 27, 7, 14, 28, 29, 5, 15, 30, 31, 8, 16, 32, 33, 17, 34, 35, 1, 3, 6, 9, 18, 36, 37, 19, 38, 39, 10, 20, 40, 41, 7, 21, 42]

cp's OEIS Frontend

A181803 Triangle read by rows: T(n,k) is the k-th smallest divisor d of n such that n sets a record for the number of its divisors that are multiples of d.

Table of values

List of values

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

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

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