A243808 - cp's OEIS frontend

A243808 Position within the triangular array A226314(n)/A054531(n) of rationals x/y such that x < y, gcd(x,y)=1 and x+y odd.

n	a(n)
1	2
2	5
3	7
4	9
5	12
6	14
7	16
8	20
9	23
10	25
11	27
12	29
13	31
14	33
15	35
16	38
17	40
18	44
19	46
20	48
21	52
22	54
23	57
24	59
25	61
26	63
27	65
28	67
29	71
30	73
31	77
32	80
33	82
34	84
35	86
36	88
37	90
38	92
39	94
40	96
41	100
42	102
43	104
44	107
45	109
46	113
47	119
48	121
49	123
50	125
51	127
52	129
53	131
54	133
55	135
56	138
57	140

[2, 5, 7, 9, 12, 14, 16, 20, 23, 25, 27, 29, 31, 33, 35, 38, 40, 44, 46, 48, 52, 54, 57, 59, 61, 63, 65, 67, 71, 73, 77, 80, 82, 84, 86, 88, 90, 92, 94, 96, 100, 102, 104, 107, 109, 113, 119, 121, 123, 125, 127, 129, 131, 133, 135, 138, 140]

cp's OEIS Frontend

A243808 Position within the triangular array A226314(n)/A054531(n) of rationals x/y such that x < y, gcd(x,y)=1 and x+y odd.

Table of values

List of values

n	a(n)
1	2
2	5
3	7
4	9
5	12
6	14
7	16
8	20
9	23
10	25
11	27
12	29
13	31
14	33
15	35
16	38
17	40
18	44
19	46
20	48
21	52
22	54
23	57
24	59
25	61
26	63
27	65
28	67
29	71
30	73
31	77
32	80
33	82
34	84
35	86
36	88
37	90
38	92
39	94
40	96
41	100
42	102
43	104
44	107
45	109
46	113
47	119
48	121
49	123
50	125
51	127
52	129
53	131
54	133
55	135
56	138
57	140

n	a(n)
1	2
2	5
3	7
4	9
5	12
6	14
7	16
8	20
9	23
10	25
11	27
12	29
13	31
14	33
15	35
16	38
17	40
18	44
19	46
20	48
21	52
22	54
23	57
24	59
25	61
26	63
27	65
28	67
29	71
30	73
31	77
32	80
33	82
34	84
35	86
36	88
37	90
38	92
39	94
40	96
41	100
42	102
43	104
44	107
45	109
46	113
47	119
48	121
49	123
50	125
51	127
52	129
53	131
54	133
55	135
56	138
57	140

n	a(n)
1	2
2	5
3	7
4	9
5	12
6	14
7	16
8	20
9	23
10	25
11	27
12	29
13	31
14	33
15	35
16	38
17	40
18	44
19	46
20	48
21	52
22	54
23	57
24	59
25	61
26	63
27	65
28	67
29	71
30	73
31	77
32	80
33	82
34	84
35	86
36	88
37	90
38	92
39	94
40	96
41	100
42	102
43	104
44	107
45	109
46	113
47	119
48	121
49	123
50	125
51	127
52	129
53	131
54	133
55	135
56	138
57	140