A020945 - cp's OEIS frontend

A020945 a(2n+1) = |a(2n) - a(2n-1)|, a(2n) = a(n) + a(n-1).

n	a(n)
1	1
2	1
3	0
4	2
5	2
6	1
7	1
8	2
9	1
10	4
11	3
12	3
13	0
14	2
15	2
16	3
17	1
18	3
19	2
20	5
21	3
22	7
23	4
24	6
25	2
26	3
27	1
28	2
29	1
30	4
31	3
32	5
33	2
34	4
35	2
36	4
37	2
38	5
39	3
40	7
41	4
42	8
43	4
44	10
45	6
46	11
47	5
48	10
49	5
50	8
51	3
52	5
53	2
54	4
55	2
56	3
57	1
58	3
59	2
60	5
61	3
62	7
63	4
64	8
65	4
66	7
67	3
68	6
69	3
70	6
71	3
72	6
73	3
74	6
75	3
76	7
77	4
78	8
79	4
80	10
81	6
82	11
83	5
84	12
85	7
86	12
87	5
88	14
89	9
90	16
91	7
92	17
93	10
94	16

[1, 1, 0, 2, 2, 1, 1, 2, 1, 4, 3, 3, 0, 2, 2, 3, 1, 3, 2, 5, 3, 7, 4, 6, 2, 3, 1, 2, 1, 4, 3, 5, 2, 4, 2, 4, 2, 5, 3, 7, 4, 8, 4, 10, 6, 11, 5, 10, 5, 8, 3, 5, 2, 4, 2, 3, 1, 3, 2, 5, 3, 7, 4, 8, 4, 7, 3, 6, 3, 6, 3, 6, 3, 6, 3, 7, 4, 8, 4, 10, 6, 11, 5, 12, 7, 12, 5, 14, 9, 16, 7, 17, 10, 16]

cp's OEIS Frontend

A020945 a(2n+1) = |a(2n) - a(2n-1)|, a(2n) = a(n) + a(n-1).

Table of values

List of values

n	a(n)
1	1
2	1
3	0
4	2
5	2
6	1
7	1
8	2
9	1
10	4
11	3
12	3
13	0
14	2
15	2
16	3
17	1
18	3
19	2
20	5
21	3
22	7
23	4
24	6
25	2
26	3
27	1
28	2
29	1
30	4
31	3
32	5
33	2
34	4
35	2
36	4
37	2
38	5
39	3
40	7
41	4
42	8
43	4
44	10
45	6
46	11
47	5
48	10
49	5
50	8
51	3
52	5
53	2
54	4
55	2
56	3
57	1
58	3
59	2
60	5
61	3
62	7
63	4
64	8
65	4
66	7
67	3
68	6
69	3
70	6
71	3
72	6
73	3
74	6
75	3
76	7
77	4
78	8
79	4
80	10
81	6
82	11
83	5
84	12
85	7
86	12
87	5
88	14
89	9
90	16
91	7
92	17
93	10
94	16

n	a(n)
1	1
2	1
3	0
4	2
5	2
6	1
7	1
8	2
9	1
10	4
11	3
12	3
13	0
14	2
15	2
16	3
17	1
18	3
19	2
20	5
21	3
22	7
23	4
24	6
25	2
26	3
27	1
28	2
29	1
30	4
31	3
32	5
33	2
34	4
35	2
36	4
37	2
38	5
39	3
40	7
41	4
42	8
43	4
44	10
45	6
46	11
47	5
48	10
49	5
50	8
51	3
52	5
53	2
54	4
55	2
56	3
57	1
58	3
59	2
60	5
61	3
62	7
63	4
64	8
65	4
66	7
67	3
68	6
69	3
70	6
71	3
72	6
73	3
74	6
75	3
76	7
77	4
78	8
79	4
80	10
81	6
82	11
83	5
84	12
85	7
86	12
87	5
88	14
89	9
90	16
91	7
92	17
93	10
94	16

n	a(n)
1	1
2	1
3	0
4	2
5	2
6	1
7	1
8	2
9	1
10	4
11	3
12	3
13	0
14	2
15	2
16	3
17	1
18	3
19	2
20	5
21	3
22	7
23	4
24	6
25	2
26	3
27	1
28	2
29	1
30	4
31	3
32	5
33	2
34	4
35	2
36	4
37	2
38	5
39	3
40	7
41	4
42	8
43	4
44	10
45	6
46	11
47	5
48	10
49	5
50	8
51	3
52	5
53	2
54	4
55	2
56	3
57	1
58	3
59	2
60	5
61	3
62	7
63	4
64	8
65	4
66	7
67	3
68	6
69	3
70	6
71	3
72	6
73	3
74	6
75	3
76	7
77	4
78	8
79	4
80	10
81	6
82	11
83	5
84	12
85	7
86	12
87	5
88	14
89	9
90	16
91	7
92	17
93	10
94	16