A228914 - cp's OEIS frontend

A228914 Positive integers N such that 1/N = p/q - q/p + r/s - s/r for some positive integers p,q,r,s.

n	a(n)
1	4
2	5
3	9
4	12
5	15
6	20
7	21
8	22
9	24
10	26
11	29
12	30
13	31
14	32
15	34
16	35
17	36
18	37
19	38
20	40
21	43
22	44
23	53
24	55
25	56
26	58
27	59
28	60
29	62
30	64
31	66
32	67
33	68
34	69
35	70
36	71
37	74
38	76
39	77
40	80
41	82
42	84
43	86
44	87
45	88
46	90
47	91
48	92
49	94
50	95
51	102
52	103
53	104
54	105
55	106
56	108
57	109
58	110
59	112
60	113
61	115
62	117
63	122
64	123
65	129
66	131
67	132
68	133
69	135
70	136
71	137
72	138
73	139
74	140
75	141
76	143
77	144
78	147

[4, 5, 9, 12, 15, 20, 21, 22, 24, 26, 29, 30, 31, 32, 34, 35, 36, 37, 38, 40, 43, 44, 53, 55, 56, 58, 59, 60, 62, 64, 66, 67, 68, 69, 70, 71, 74, 76, 77, 80, 82, 84, 86, 87, 88, 90, 91, 92, 94, 95, 102, 103, 104, 105, 106, 108, 109, 110, 112, 113, 115, 117, 122, 123, 129, 131, 132, 133, 135, 136, 137, 138, 139, 140, 141, 143, 144, 147]

cp's OEIS Frontend

A228914 Positive integers N such that 1/N = p/q - q/p + r/s - s/r for some positive integers p,q,r,s.

Table of values

List of values

n	a(n)
1	4
2	5
3	9
4	12
5	15
6	20
7	21
8	22
9	24
10	26
11	29
12	30
13	31
14	32
15	34
16	35
17	36
18	37
19	38
20	40
21	43
22	44
23	53
24	55
25	56
26	58
27	59
28	60
29	62
30	64
31	66
32	67
33	68
34	69
35	70
36	71
37	74
38	76
39	77
40	80
41	82
42	84
43	86
44	87
45	88
46	90
47	91
48	92
49	94
50	95
51	102
52	103
53	104
54	105
55	106
56	108
57	109
58	110
59	112
60	113
61	115
62	117
63	122
64	123
65	129
66	131
67	132
68	133
69	135
70	136
71	137
72	138
73	139
74	140
75	141
76	143
77	144
78	147

n	a(n)
1	4
2	5
3	9
4	12
5	15
6	20
7	21
8	22
9	24
10	26
11	29
12	30
13	31
14	32
15	34
16	35
17	36
18	37
19	38
20	40
21	43
22	44
23	53
24	55
25	56
26	58
27	59
28	60
29	62
30	64
31	66
32	67
33	68
34	69
35	70
36	71
37	74
38	76
39	77
40	80
41	82
42	84
43	86
44	87
45	88
46	90
47	91
48	92
49	94
50	95
51	102
52	103
53	104
54	105
55	106
56	108
57	109
58	110
59	112
60	113
61	115
62	117
63	122
64	123
65	129
66	131
67	132
68	133
69	135
70	136
71	137
72	138
73	139
74	140
75	141
76	143
77	144
78	147

n	a(n)
1	4
2	5
3	9
4	12
5	15
6	20
7	21
8	22
9	24
10	26
11	29
12	30
13	31
14	32
15	34
16	35
17	36
18	37
19	38
20	40
21	43
22	44
23	53
24	55
25	56
26	58
27	59
28	60
29	62
30	64
31	66
32	67
33	68
34	69
35	70
36	71
37	74
38	76
39	77
40	80
41	82
42	84
43	86
44	87
45	88
46	90
47	91
48	92
49	94
50	95
51	102
52	103
53	104
54	105
55	106
56	108
57	109
58	110
59	112
60	113
61	115
62	117
63	122
64	123
65	129
66	131
67	132
68	133
69	135
70	136
71	137
72	138
73	139
74	140
75	141
76	143
77	144
78	147