A317921 - cp's OEIS frontend

A317921 a(1) = a(2) = 1; for n >= 3, a(n) = 3*a(t(n)) - a(n-t(n)) where t = A004001.

n	a(n)
1	1
2	1
3	2
4	2
5	5
6	5
7	4
8	4
9	13
10	13
11	10
12	7
13	7
14	7
15	8
16	8
17	35
18	35
19	26
20	17
21	8
22	8
23	8
24	8
25	11
26	14
27	17
28	17
29	17
30	17
31	16
32	16
33	97
34	97
35	70
36	43
37	16
38	-11
39	-11
40	-11
41	-11
42	-11
43	-2
44	7
45	16
46	25
47	34
48	43
49	43
50	43
51	43
52	43
53	43
54	43
55	40
56	37
57	34
58	31
59	31
60	31
61	31
62	31
63	32
64	32
65	275
66	275
67	194
68	113
69	32
70	-49
71	-130
72	-130
73	-130
74	-130
75	-130

[1, 1, 2, 2, 5, 5, 4, 4, 13, 13, 10, 7, 7, 7, 8, 8, 35, 35, 26, 17, 8, 8, 8, 8, 11, 14, 17, 17, 17, 17, 16, 16, 97, 97, 70, 43, 16, -11, -11, -11, -11, -11, -2, 7, 16, 25, 34, 43, 43, 43, 43, 43, 43, 43, 40, 37, 34, 31, 31, 31, 31, 31, 32, 32, 275, 275, 194, 113, 32, -49, -130, -130, -130, -130, -130]

cp's OEIS Frontend

A317921 a(1) = a(2) = 1; for n >= 3, a(n) = 3*a(t(n)) - a(n-t(n)) where t = A004001.

Table of values

List of values