A381565 - cp's OEIS frontend

A381565 2-tone chromatic number of a particular class of planar graphs with 3n+3 vertices.

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

[5, 6, 7, 7, 8, 8, 9, 9, 10, 10, 10, 11, 11, 11, 12, 12, 12, 12, 13, 13, 13, 13, 14, 14, 14, 14, 15, 15, 15, 15, 15, 16, 16, 16, 16, 16, 17, 17, 17, 17, 17, 18, 18, 18, 18, 18, 18, 19, 19, 19, 19, 19, 19, 20, 20, 20, 20, 20, 20, 21]

cp's OEIS Frontend

A381565 2-tone chromatic number of a particular class of planar graphs with 3n+3 vertices.

Table of values

List of values

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

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

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