A239233 - cp's OEIS frontend

A239233 Smaller member in a set of two distinct odd numbers the sum of whose reciprocals is 2/(2*n - 1), or 0 if no such integer exists.

n	a(n)
1	0
2	0
3	3
4	0
5	5
6	0
7	7
8	9
9	9
10	0
11	11
12	0
13	13
14	15
15	15
16	0
17	17
18	21
19	19
20	21
21	21
22	0
23	23
24	0
25	25
26	27
27	27
28	33
29	29
30	0
31	31
32	33
33	33
34	0
35	35
36	0
37	37
38	39
39	39
40	0
41	41
42	0
43	43
44	45
45	45
46	49
47	47
48	57
49	49
50	51
51	51
52	0
53	53
54	0
55	55
56	57
57	57
58	69
59	59
60	63
61	61
62	63
63	63
64	0
65	65
66	0
67	67
68	69
69	69
70	0
71	71

[0, 0, 3, 0, 5, 0, 7, 9, 9, 0, 11, 0, 13, 15, 15, 0, 17, 21, 19, 21, 21, 0, 23, 0, 25, 27, 27, 33, 29, 0, 31, 33, 33, 0, 35, 0, 37, 39, 39, 0, 41, 0, 43, 45, 45, 49, 47, 57, 49, 51, 51, 0, 53, 0, 55, 57, 57, 69, 59, 63, 61, 63, 63, 0, 65, 0, 67, 69, 69, 0, 71]

cp's OEIS Frontend

A239233 Smaller member in a set of two distinct odd numbers the sum of whose reciprocals is 2/(2*n - 1), or 0 if no such integer exists.

Table of values

List of values

n	a(n)
1	0
2	0
3	3
4	0
5	5
6	0
7	7
8	9
9	9
10	0
11	11
12	0
13	13
14	15
15	15
16	0
17	17
18	21
19	19
20	21
21	21
22	0
23	23
24	0
25	25
26	27
27	27
28	33
29	29
30	0
31	31
32	33
33	33
34	0
35	35
36	0
37	37
38	39
39	39
40	0
41	41
42	0
43	43
44	45
45	45
46	49
47	47
48	57
49	49
50	51
51	51
52	0
53	53
54	0
55	55
56	57
57	57
58	69
59	59
60	63
61	61
62	63
63	63
64	0
65	65
66	0
67	67
68	69
69	69
70	0
71	71

n	a(n)
1	0
2	0
3	3
4	0
5	5
6	0
7	7
8	9
9	9
10	0
11	11
12	0
13	13
14	15
15	15
16	0
17	17
18	21
19	19
20	21
21	21
22	0
23	23
24	0
25	25
26	27
27	27
28	33
29	29
30	0
31	31
32	33
33	33
34	0
35	35
36	0
37	37
38	39
39	39
40	0
41	41
42	0
43	43
44	45
45	45
46	49
47	47
48	57
49	49
50	51
51	51
52	0
53	53
54	0
55	55
56	57
57	57
58	69
59	59
60	63
61	61
62	63
63	63
64	0
65	65
66	0
67	67
68	69
69	69
70	0
71	71

n	a(n)
1	0
2	0
3	3
4	0
5	5
6	0
7	7
8	9
9	9
10	0
11	11
12	0
13	13
14	15
15	15
16	0
17	17
18	21
19	19
20	21
21	21
22	0
23	23
24	0
25	25
26	27
27	27
28	33
29	29
30	0
31	31
32	33
33	33
34	0
35	35
36	0
37	37
38	39
39	39
40	0
41	41
42	0
43	43
44	45
45	45
46	49
47	47
48	57
49	49
50	51
51	51
52	0
53	53
54	0
55	55
56	57
57	57
58	69
59	59
60	63
61	61
62	63
63	63
64	0
65	65
66	0
67	67
68	69
69	69
70	0
71	71