A214803 - cp's OEIS frontend

A214803 Frobenius numbers of numerators and denominators of rational numbers in order of their canonical enumeration.

n	a(n)
1	-1
2	-1
3	1
4	-1
5	5
6	-1
7	3
8	7
9	11
10	-1
11	19
12	-1
13	5
14	11
15	17
16	23
17	29
18	-1
19	13
20	27
21	41
22	-1
23	7
24	23
25	31
26	47
27	55
28	-1
29	17
30	53
31	71
32	-1
33	9
34	19
35	29
36	39
37	49
38	59
39	69
40	79
41	89
42	-1
43	43
44	65
45	109
46	-1
47	11
48	23
49	35
50	47
51	59
52	71
53	83
54	95
55	107
56	119
57	131
58	-1
59	25
60	51
61	103
62	129
63	155
64	-1
65	13

[-1, -1, 1, -1, 5, -1, 3, 7, 11, -1, 19, -1, 5, 11, 17, 23, 29, -1, 13, 27, 41, -1, 7, 23, 31, 47, 55, -1, 17, 53, 71, -1, 9, 19, 29, 39, 49, 59, 69, 79, 89, -1, 43, 65, 109, -1, 11, 23, 35, 47, 59, 71, 83, 95, 107, 119, 131, -1, 25, 51, 103, 129, 155, -1, 13]

cp's OEIS Frontend

A214803 Frobenius numbers of numerators and denominators of rational numbers in order of their canonical enumeration.

Table of values

List of values

n	a(n)
1	-1
2	-1
3	1
4	-1
5	5
6	-1
7	3
8	7
9	11
10	-1
11	19
12	-1
13	5
14	11
15	17
16	23
17	29
18	-1
19	13
20	27
21	41
22	-1
23	7
24	23
25	31
26	47
27	55
28	-1
29	17
30	53
31	71
32	-1
33	9
34	19
35	29
36	39
37	49
38	59
39	69
40	79
41	89
42	-1
43	43
44	65
45	109
46	-1
47	11
48	23
49	35
50	47
51	59
52	71
53	83
54	95
55	107
56	119
57	131
58	-1
59	25
60	51
61	103
62	129
63	155
64	-1
65	13

n	a(n)
1	-1
2	-1
3	1
4	-1
5	5
6	-1
7	3
8	7
9	11
10	-1
11	19
12	-1
13	5
14	11
15	17
16	23
17	29
18	-1
19	13
20	27
21	41
22	-1
23	7
24	23
25	31
26	47
27	55
28	-1
29	17
30	53
31	71
32	-1
33	9
34	19
35	29
36	39
37	49
38	59
39	69
40	79
41	89
42	-1
43	43
44	65
45	109
46	-1
47	11
48	23
49	35
50	47
51	59
52	71
53	83
54	95
55	107
56	119
57	131
58	-1
59	25
60	51
61	103
62	129
63	155
64	-1
65	13

n	a(n)
1	-1
2	-1
3	1
4	-1
5	5
6	-1
7	3
8	7
9	11
10	-1
11	19
12	-1
13	5
14	11
15	17
16	23
17	29
18	-1
19	13
20	27
21	41
22	-1
23	7
24	23
25	31
26	47
27	55
28	-1
29	17
30	53
31	71
32	-1
33	9
34	19
35	29
36	39
37	49
38	59
39	69
40	79
41	89
42	-1
43	43
44	65
45	109
46	-1
47	11
48	23
49	35
50	47
51	59
52	71
53	83
54	95
55	107
56	119
57	131
58	-1
59	25
60	51
61	103
62	129
63	155
64	-1
65	13