A334231 - cp's OEIS frontend

A334231 Triangle read by rows: T(n,k) gives the join of n and k in the graded lattice of the positive integers defined by covering relations "n covers (n - n/p)" for all divisors p of n.

n	a(n)
1	1
2	2
3	2
4	3
5	3
6	3
7	4
8	4
9	6
10	4
11	5
12	5
13	15
14	5
15	5
16	6
17	6
18	6
19	6
20	15
21	6
22	7
23	7
24	7
25	7
26	35
27	7
28	7
29	8
30	8
31	12
32	8
33	10
34	12
35	14
36	8
37	9
38	9
39	9
40	9
41	45
42	9
43	21
44	18
45	9
46	10
47	10
48	15
49	10
50	10
51	15
52	35
53	10
54	45
55	10
56	11
57	11
58	33
59	11
60	11
61	33
62	77
63	11
64	99
65	11
66	11
67	12
68	12
69	12
70	12
71	15
72	12
73	14
74	12

[1, 2, 2, 3, 3, 3, 4, 4, 6, 4, 5, 5, 15, 5, 5, 6, 6, 6, 6, 15, 6, 7, 7, 7, 7, 35, 7, 7, 8, 8, 12, 8, 10, 12, 14, 8, 9, 9, 9, 9, 45, 9, 21, 18, 9, 10, 10, 15, 10, 10, 15, 35, 10, 45, 10, 11, 11, 33, 11, 11, 33, 77, 11, 99, 11, 11, 12, 12, 12, 12, 15, 12, 14, 12]

cp's OEIS Frontend

A334231 Triangle read by rows: T(n,k) gives the join of n and k in the graded lattice of the positive integers defined by covering relations "n covers (n - n/p)" for all divisors p of n.

Table of values

List of values

n	a(n)
1	1
2	2
3	2
4	3
5	3
6	3
7	4
8	4
9	6
10	4
11	5
12	5
13	15
14	5
15	5
16	6
17	6
18	6
19	6
20	15
21	6
22	7
23	7
24	7
25	7
26	35
27	7
28	7
29	8
30	8
31	12
32	8
33	10
34	12
35	14
36	8
37	9
38	9
39	9
40	9
41	45
42	9
43	21
44	18
45	9
46	10
47	10
48	15
49	10
50	10
51	15
52	35
53	10
54	45
55	10
56	11
57	11
58	33
59	11
60	11
61	33
62	77
63	11
64	99
65	11
66	11
67	12
68	12
69	12
70	12
71	15
72	12
73	14
74	12

n	a(n)
1	1
2	2
3	2
4	3
5	3
6	3
7	4
8	4
9	6
10	4
11	5
12	5
13	15
14	5
15	5
16	6
17	6
18	6
19	6
20	15
21	6
22	7
23	7
24	7
25	7
26	35
27	7
28	7
29	8
30	8
31	12
32	8
33	10
34	12
35	14
36	8
37	9
38	9
39	9
40	9
41	45
42	9
43	21
44	18
45	9
46	10
47	10
48	15
49	10
50	10
51	15
52	35
53	10
54	45
55	10
56	11
57	11
58	33
59	11
60	11
61	33
62	77
63	11
64	99
65	11
66	11
67	12
68	12
69	12
70	12
71	15
72	12
73	14
74	12

n	a(n)
1	1
2	2
3	2
4	3
5	3
6	3
7	4
8	4
9	6
10	4
11	5
12	5
13	15
14	5
15	5
16	6
17	6
18	6
19	6
20	15
21	6
22	7
23	7
24	7
25	7
26	35
27	7
28	7
29	8
30	8
31	12
32	8
33	10
34	12
35	14
36	8
37	9
38	9
39	9
40	9
41	45
42	9
43	21
44	18
45	9
46	10
47	10
48	15
49	10
50	10
51	15
52	35
53	10
54	45
55	10
56	11
57	11
58	33
59	11
60	11
61	33
62	77
63	11
64	99
65	11
66	11
67	12
68	12
69	12
70	12
71	15
72	12
73	14
74	12