A147954 - cp's OEIS frontend

A147954 a(0) = 0, a(1) = a(2) = 1, a(n) = a(a(n-1)) + a(n-a(n-1)) for 3 <= n <= 5, and a(n) = a(a(n-1)) + r(n) for n >= 6, where r(n) = a(a(floor(n/6))) for n == 0, 1, 2, 3, 4 (mod 6), and r(n) = a(n - a(floor(n/6))) for n == 5 (mod 6).

n	a(n)
0	0
1	1
2	1
3	2
4	2
5	3
6	3
7	3
8	3
9	3
10	3
11	5
12	4
13	3
14	3
15	3
16	3
17	5
18	4
19	3
20	3
21	3
22	3
23	5
24	4
25	3
26	3
27	3
28	3
29	5
30	5
31	5
32	5
33	5
34	5
35	8
36	5
37	5
38	5
39	5
40	5
41	8
42	5
43	5
44	5
45	5
46	5
47	8
48	5
49	5
50	5
51	5
52	5
53	8
54	5
55	5
56	5
57	5
58	5
59	8
60	5
61	5
62	5
63	5
64	5
65	8
66	6
67	6
68	6
69	6
70	6
71	9
72	5
73	5
74	5
75	5
76	5
77	8
78	5
79	5
80	5
81	5
82	5
83	8
84	5
85	5
86	5

[0, 1, 1, 2, 2, 3, 3, 3, 3, 3, 3, 5, 4, 3, 3, 3, 3, 5, 4, 3, 3, 3, 3, 5, 4, 3, 3, 3, 3, 5, 5, 5, 5, 5, 5, 8, 5, 5, 5, 5, 5, 8, 5, 5, 5, 5, 5, 8, 5, 5, 5, 5, 5, 8, 5, 5, 5, 5, 5, 8, 5, 5, 5, 5, 5, 8, 6, 6, 6, 6, 6, 9, 5, 5, 5, 5, 5, 8, 5, 5, 5, 5, 5, 8, 5, 5, 5]

cp's OEIS Frontend

A147954 a(0) = 0, a(1) = a(2) = 1, a(n) = a(a(n-1)) + a(n-a(n-1)) for 3 <= n <= 5, and a(n) = a(a(n-1)) + r(n) for n >= 6, where r(n) = a(a(floor(n/6))) for n == 0, 1, 2, 3, 4 (mod 6), and r(n) = a(n - a(floor(n/6))) for n == 5 (mod 6).

Table of values

List of values

n	a(n)
0	0
1	1
2	1
3	2
4	2
5	3
6	3
7	3
8	3
9	3
10	3
11	5
12	4
13	3
14	3
15	3
16	3
17	5
18	4
19	3
20	3
21	3
22	3
23	5
24	4
25	3
26	3
27	3
28	3
29	5
30	5
31	5
32	5
33	5
34	5
35	8
36	5
37	5
38	5
39	5
40	5
41	8
42	5
43	5
44	5
45	5
46	5
47	8
48	5
49	5
50	5
51	5
52	5
53	8
54	5
55	5
56	5
57	5
58	5
59	8
60	5
61	5
62	5
63	5
64	5
65	8
66	6
67	6
68	6
69	6
70	6
71	9
72	5
73	5
74	5
75	5
76	5
77	8
78	5
79	5
80	5
81	5
82	5
83	8
84	5
85	5
86	5

n	a(n)
0	0
1	1
2	1
3	2
4	2
5	3
6	3
7	3
8	3
9	3
10	3
11	5
12	4
13	3
14	3
15	3
16	3
17	5
18	4
19	3
20	3
21	3
22	3
23	5
24	4
25	3
26	3
27	3
28	3
29	5
30	5
31	5
32	5
33	5
34	5
35	8
36	5
37	5
38	5
39	5
40	5
41	8
42	5
43	5
44	5
45	5
46	5
47	8
48	5
49	5
50	5
51	5
52	5
53	8
54	5
55	5
56	5
57	5
58	5
59	8
60	5
61	5
62	5
63	5
64	5
65	8
66	6
67	6
68	6
69	6
70	6
71	9
72	5
73	5
74	5
75	5
76	5
77	8
78	5
79	5
80	5
81	5
82	5
83	8
84	5
85	5
86	5

n	a(n)
0	0
1	1
2	1
3	2
4	2
5	3
6	3
7	3
8	3
9	3
10	3
11	5
12	4
13	3
14	3
15	3
16	3
17	5
18	4
19	3
20	3
21	3
22	3
23	5
24	4
25	3
26	3
27	3
28	3
29	5
30	5
31	5
32	5
33	5
34	5
35	8
36	5
37	5
38	5
39	5
40	5
41	8
42	5
43	5
44	5
45	5
46	5
47	8
48	5
49	5
50	5
51	5
52	5
53	8
54	5
55	5
56	5
57	5
58	5
59	8
60	5
61	5
62	5
63	5
64	5
65	8
66	6
67	6
68	6
69	6
70	6
71	9
72	5
73	5
74	5
75	5
76	5
77	8
78	5
79	5
80	5
81	5
82	5
83	8
84	5
85	5
86	5