A272081 - cp's OEIS frontend

A272081 Irregular triangle read by rows: strictly decreasing positive integer sequences in lexicographic order with the property that the sum of inverses is the inverse of an integer.

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

[1, 2, 3, 4, 5, 6, 6, 3, 6, 3, 2, 7, 8, 9, 10, 11, 12, 12, 4, 12, 6, 12, 6, 4, 12, 6, 4, 2, 13, 14, 15, 15, 10, 15, 10, 3, 15, 10, 3, 2, 15, 10, 6, 15, 12, 10, 15, 12, 10, 4, 15, 12, 10, 4, 2, 15, 12, 10, 6, 4, 3, 16, 17, 18, 18, 9, 18, 9, 3, 18, 9, 3, 2, 18, 9]

cp's OEIS Frontend

A272081 Irregular triangle read by rows: strictly decreasing positive integer sequences in lexicographic order with the property that the sum of inverses is the inverse of an integer.

Table of values

List of values

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

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

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