A378305 - cp's OEIS frontend

A378305 Unique sequence s starting with 2,1,2 such that if r(r(r(s))) = s and r(s) != s and r(r(s)) != s, where r(#) denotes the runlength sequence of a sequence #.

n	a(n)
1	2
2	1
3	2
4	2
5	1
6	1
7	2
8	1
9	1
10	2
11	2
12	1
13	2
14	1
15	1
16	2
17	1
18	1
19	2
20	2
21	1
22	2
23	2
24	1
25	1
26	2
27	1
28	2
29	2
30	1
31	2
32	1
33	1
34	2
35	1
36	1
37	2
38	2
39	1
40	2
41	1
42	1
43	2
44	1
45	2
46	2
47	1
48	1
49	2
50	1
51	1
52	2
53	2
54	1
55	2
56	2
57	1
58	2
59	1
60	1
61	2
62	1
63	2
64	2
65	1
66	1
67	2
68	1
69	1
70	2
71	1
72	2
73	2
74	1
75	2
76	2
77	1
78	1
79	2
80	1
81	2
82	2
83	1
84	2
85	1
86	1

[2, 1, 2, 2, 1, 1, 2, 1, 1, 2, 2, 1, 2, 1, 1, 2, 1, 1, 2, 2, 1, 2, 2, 1, 1, 2, 1, 2, 2, 1, 2, 1, 1, 2, 1, 1, 2, 2, 1, 2, 1, 1, 2, 1, 2, 2, 1, 1, 2, 1, 1, 2, 2, 1, 2, 2, 1, 2, 1, 1, 2, 1, 2, 2, 1, 1, 2, 1, 1, 2, 1, 2, 2, 1, 2, 2, 1, 1, 2, 1, 2, 2, 1, 2, 1, 1]

cp's OEIS Frontend

A378305 Unique sequence s starting with 2,1,2 such that if r(r(r(s))) = s and r(s) != s and r(r(s)) != s, where r(#) denotes the runlength sequence of a sequence #.

Table of values

List of values

n	a(n)
1	2
2	1
3	2
4	2
5	1
6	1
7	2
8	1
9	1
10	2
11	2
12	1
13	2
14	1
15	1
16	2
17	1
18	1
19	2
20	2
21	1
22	2
23	2
24	1
25	1
26	2
27	1
28	2
29	2
30	1
31	2
32	1
33	1
34	2
35	1
36	1
37	2
38	2
39	1
40	2
41	1
42	1
43	2
44	1
45	2
46	2
47	1
48	1
49	2
50	1
51	1
52	2
53	2
54	1
55	2
56	2
57	1
58	2
59	1
60	1
61	2
62	1
63	2
64	2
65	1
66	1
67	2
68	1
69	1
70	2
71	1
72	2
73	2
74	1
75	2
76	2
77	1
78	1
79	2
80	1
81	2
82	2
83	1
84	2
85	1
86	1

n	a(n)
1	2
2	1
3	2
4	2
5	1
6	1
7	2
8	1
9	1
10	2
11	2
12	1
13	2
14	1
15	1
16	2
17	1
18	1
19	2
20	2
21	1
22	2
23	2
24	1
25	1
26	2
27	1
28	2
29	2
30	1
31	2
32	1
33	1
34	2
35	1
36	1
37	2
38	2
39	1
40	2
41	1
42	1
43	2
44	1
45	2
46	2
47	1
48	1
49	2
50	1
51	1
52	2
53	2
54	1
55	2
56	2
57	1
58	2
59	1
60	1
61	2
62	1
63	2
64	2
65	1
66	1
67	2
68	1
69	1
70	2
71	1
72	2
73	2
74	1
75	2
76	2
77	1
78	1
79	2
80	1
81	2
82	2
83	1
84	2
85	1
86	1

n	a(n)
1	2
2	1
3	2
4	2
5	1
6	1
7	2
8	1
9	1
10	2
11	2
12	1
13	2
14	1
15	1
16	2
17	1
18	1
19	2
20	2
21	1
22	2
23	2
24	1
25	1
26	2
27	1
28	2
29	2
30	1
31	2
32	1
33	1
34	2
35	1
36	1
37	2
38	2
39	1
40	2
41	1
42	1
43	2
44	1
45	2
46	2
47	1
48	1
49	2
50	1
51	1
52	2
53	2
54	1
55	2
56	2
57	1
58	2
59	1
60	1
61	2
62	1
63	2
64	2
65	1
66	1
67	2
68	1
69	1
70	2
71	1
72	2
73	2
74	1
75	2
76	2
77	1
78	1
79	2
80	1
81	2
82	2
83	1
84	2
85	1
86	1