A000002 - cp's OEIS frontend

A000002 Kolakoski sequence: a(n) is length of n-th run; a(1) = 1; sequence consists just of 1's and 2's.

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

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

cp's OEIS Frontend

A000002 Kolakoski sequence: a(n) is length of n-th run; a(1) = 1; sequence consists just of 1's and 2's.

Table of values

List of values

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

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

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