A157813 - cp's OEIS frontend

A157813 Denominators of fractions arranged in "antidiagonal boustrophedon" ordering with equivalent fractions removed: (1/1, 2/1, 1/2, 1/3, 3/1, 4/1, 3/2, 2/3, 1/4, 1/5, 5/1, 6/1, 5/2, ...).

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

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

cp's OEIS Frontend

A157813 Denominators of fractions arranged in "antidiagonal boustrophedon" ordering with equivalent fractions removed: (1/1, 2/1, 1/2, 1/3, 3/1, 4/1, 3/2, 2/3, 1/4, 1/5, 5/1, 6/1, 5/2, ...).

Table of values

List of values

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

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

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