A281528 - cp's OEIS frontend

A281528 a(n) = least numerator k such that the proper fraction k/n needs three or more terms as a signed sum of distinct unit fraction, or 0 if no such numerator exists.

n	a(n)
2	0
3	0
4	0
5	0
6	0
7	5
8	0
9	7
10	0
11	7
12	0
13	5
14	10
15	11
16	11
17	5
18	13
19	7
20	13
21	13
22	14
23	5
24	17
25	7
26	10
27	11
28	17
29	8
30	19
31	7
32	13
33	13
34	10
35	11
36	23
37	5
38	11
39	11
40	17
41	9
42	25
43	5
44	17
45	13
46	10
47	5
48	29
49	9
50	14
51	11
52	19
53	5
54	22
55	13
56	17
57	13
58	11
59	7
60	37
61	7
62	13
63	13
64	19
65	17
66	26
67	5
68	20
69	15
70	22
71	11
72	29
73	5
74	10

[0, 0, 0, 0, 0, 5, 0, 7, 0, 7, 0, 5, 10, 11, 11, 5, 13, 7, 13, 13, 14, 5, 17, 7, 10, 11, 17, 8, 19, 7, 13, 13, 10, 11, 23, 5, 11, 11, 17, 9, 25, 5, 17, 13, 10, 5, 29, 9, 14, 11, 19, 5, 22, 13, 17, 13, 11, 7, 37, 7, 13, 13, 19, 17, 26, 5, 20, 15, 22, 11, 29, 5, 10]

cp's OEIS Frontend

A281528 a(n) = least numerator k such that the proper fraction k/n needs three or more terms as a signed sum of distinct unit fraction, or 0 if no such numerator exists.

Table of values

List of values

n	a(n)
2	0
3	0
4	0
5	0
6	0
7	5
8	0
9	7
10	0
11	7
12	0
13	5
14	10
15	11
16	11
17	5
18	13
19	7
20	13
21	13
22	14
23	5
24	17
25	7
26	10
27	11
28	17
29	8
30	19
31	7
32	13
33	13
34	10
35	11
36	23
37	5
38	11
39	11
40	17
41	9
42	25
43	5
44	17
45	13
46	10
47	5
48	29
49	9
50	14
51	11
52	19
53	5
54	22
55	13
56	17
57	13
58	11
59	7
60	37
61	7
62	13
63	13
64	19
65	17
66	26
67	5
68	20
69	15
70	22
71	11
72	29
73	5
74	10

n	a(n)
2	0
3	0
4	0
5	0
6	0
7	5
8	0
9	7
10	0
11	7
12	0
13	5
14	10
15	11
16	11
17	5
18	13
19	7
20	13
21	13
22	14
23	5
24	17
25	7
26	10
27	11
28	17
29	8
30	19
31	7
32	13
33	13
34	10
35	11
36	23
37	5
38	11
39	11
40	17
41	9
42	25
43	5
44	17
45	13
46	10
47	5
48	29
49	9
50	14
51	11
52	19
53	5
54	22
55	13
56	17
57	13
58	11
59	7
60	37
61	7
62	13
63	13
64	19
65	17
66	26
67	5
68	20
69	15
70	22
71	11
72	29
73	5
74	10

n	a(n)
2	0
3	0
4	0
5	0
6	0
7	5
8	0
9	7
10	0
11	7
12	0
13	5
14	10
15	11
16	11
17	5
18	13
19	7
20	13
21	13
22	14
23	5
24	17
25	7
26	10
27	11
28	17
29	8
30	19
31	7
32	13
33	13
34	10
35	11
36	23
37	5
38	11
39	11
40	17
41	9
42	25
43	5
44	17
45	13
46	10
47	5
48	29
49	9
50	14
51	11
52	19
53	5
54	22
55	13
56	17
57	13
58	11
59	7
60	37
61	7
62	13
63	13
64	19
65	17
66	26
67	5
68	20
69	15
70	22
71	11
72	29
73	5
74	10