A025142 - cp's OEIS frontend

A025142 Fixed point of the square runlength transform, with a(1) = 1 (the runlength transform of a binary sequence is the sequence of the lengths of its runs).

n	a(n)
1	1
2	1
3	2
4	1
5	1
6	2
7	2
8	1
9	2
10	2
11	1
12	2
13	1
14	1
15	2
16	2
17	1
18	2
19	2
20	1
21	1
22	2
23	1
24	2
25	2
26	1
27	2
28	1
29	1
30	2
31	1
32	1
33	2
34	2
35	1
36	2
37	1
38	1
39	2
40	1
41	2
42	2
43	1
44	1
45	2
46	1
47	1
48	2
49	1
50	2
51	2
52	1
53	2
54	1
55	1
56	2
57	2
58	1
59	2
60	2
61	1
62	1
63	2
64	1
65	1
66	2
67	1
68	2
69	2
70	1
71	2
72	2
73	1
74	1
75	2
76	1
77	2
78	2
79	1
80	2
81	1
82	1
83	2
84	1
85	1
86	2
87	2
88	1
89	2
90	2
91	1
92	1
93	2
94	1
95	2
96	2
97	1
98	2
99	2
100	1
101	1
102	2
103	1
104	1
105	2
106	1
107	2
108	2
109	1
110	2
111	1

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

cp's OEIS Frontend

A025142 Fixed point of the square runlength transform, with a(1) = 1 (the runlength transform of a binary sequence is the sequence of the lengths of its runs).

Table of values

List of values

n	a(n)
1	1
2	1
3	2
4	1
5	1
6	2
7	2
8	1
9	2
10	2
11	1
12	2
13	1
14	1
15	2
16	2
17	1
18	2
19	2
20	1
21	1
22	2
23	1
24	2
25	2
26	1
27	2
28	1
29	1
30	2
31	1
32	1
33	2
34	2
35	1
36	2
37	1
38	1
39	2
40	1
41	2
42	2
43	1
44	1
45	2
46	1
47	1
48	2
49	1
50	2
51	2
52	1
53	2
54	1
55	1
56	2
57	2
58	1
59	2
60	2
61	1
62	1
63	2
64	1
65	1
66	2
67	1
68	2
69	2
70	1
71	2
72	2
73	1
74	1
75	2
76	1
77	2
78	2
79	1
80	2
81	1
82	1
83	2
84	1
85	1
86	2
87	2
88	1
89	2
90	2
91	1
92	1
93	2
94	1
95	2
96	2
97	1
98	2
99	2
100	1
101	1
102	2
103	1
104	1
105	2
106	1
107	2
108	2
109	1
110	2
111	1

n	a(n)
1	1
2	1
3	2
4	1
5	1
6	2
7	2
8	1
9	2
10	2
11	1
12	2
13	1
14	1
15	2
16	2
17	1
18	2
19	2
20	1
21	1
22	2
23	1
24	2
25	2
26	1
27	2
28	1
29	1
30	2
31	1
32	1
33	2
34	2
35	1
36	2
37	1
38	1
39	2
40	1
41	2
42	2
43	1
44	1
45	2
46	1
47	1
48	2
49	1
50	2
51	2
52	1
53	2
54	1
55	1
56	2
57	2
58	1
59	2
60	2
61	1
62	1
63	2
64	1
65	1
66	2
67	1
68	2
69	2
70	1
71	2
72	2
73	1
74	1
75	2
76	1
77	2
78	2
79	1
80	2
81	1
82	1
83	2
84	1
85	1
86	2
87	2
88	1
89	2
90	2
91	1
92	1
93	2
94	1
95	2
96	2
97	1
98	2
99	2
100	1
101	1
102	2
103	1
104	1
105	2
106	1
107	2
108	2
109	1
110	2
111	1

n	a(n)
1	1
2	1
3	2
4	1
5	1
6	2
7	2
8	1
9	2
10	2
11	1
12	2
13	1
14	1
15	2
16	2
17	1
18	2
19	2
20	1
21	1
22	2
23	1
24	2
25	2
26	1
27	2
28	1
29	1
30	2
31	1
32	1
33	2
34	2
35	1
36	2
37	1
38	1
39	2
40	1
41	2
42	2
43	1
44	1
45	2
46	1
47	1
48	2
49	1
50	2
51	2
52	1
53	2
54	1
55	1
56	2
57	2
58	1
59	2
60	2
61	1
62	1
63	2
64	1
65	1
66	2
67	1
68	2
69	2
70	1
71	2
72	2
73	1
74	1
75	2
76	1
77	2
78	2
79	1
80	2
81	1
82	1
83	2
84	1
85	1
86	2
87	2
88	1
89	2
90	2
91	1
92	1
93	2
94	1
95	2
96	2
97	1
98	2
99	2
100	1
101	1
102	2
103	1
104	1
105	2
106	1
107	2
108	2
109	1
110	2
111	1