A020943 - cp's OEIS frontend

A020943 a(2n+1) = |a(2n) - a(2n-1)|, a(2n) = a(n) + a(n-1).

n	a(n)
1	0
2	1
3	1
4	1
5	0
6	2
7	2
8	2
9	0
10	1
11	1
12	2
13	1
14	4
15	3
16	4
17	1
18	2
19	1
20	1
21	0
22	2
23	2
24	3
25	1
26	3
27	2
28	5
29	3
30	7
31	4
32	7
33	3
34	5
35	2
36	3
37	1
38	3
39	2
40	2
41	0
42	1
43	1
44	2
45	1
46	4
47	3
48	5
49	2
50	4
51	2
52	4
53	2
54	5
55	3
56	7
57	4
58	8
59	4
60	10
61	6
62	11
63	5
64	11
65	6
66	10
67	4
68	8
69	4
70	7
71	3
72	5
73	2
74	4
75	2
76	4
77	2
78	5
79	3
80	4
81	1
82	2
83	1
84	1
85	0
86	2
87	2
88	3
89	1
90	3
91	2
92	5
93	3
94	7
95	4
96	8
97	4
98	7
99	3
100	6
101	3
102	6
103	3

[0, 1, 1, 1, 0, 2, 2, 2, 0, 1, 1, 2, 1, 4, 3, 4, 1, 2, 1, 1, 0, 2, 2, 3, 1, 3, 2, 5, 3, 7, 4, 7, 3, 5, 2, 3, 1, 3, 2, 2, 0, 1, 1, 2, 1, 4, 3, 5, 2, 4, 2, 4, 2, 5, 3, 7, 4, 8, 4, 10, 6, 11, 5, 11, 6, 10, 4, 8, 4, 7, 3, 5, 2, 4, 2, 4, 2, 5, 3, 4, 1, 2, 1, 1, 0, 2, 2, 3, 1, 3, 2, 5, 3, 7, 4, 8, 4, 7, 3, 6, 3, 6, 3]

cp's OEIS Frontend

A020943 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	0
2	1
3	1
4	1
5	0
6	2
7	2
8	2
9	0
10	1
11	1
12	2
13	1
14	4
15	3
16	4
17	1
18	2
19	1
20	1
21	0
22	2
23	2
24	3
25	1
26	3
27	2
28	5
29	3
30	7
31	4
32	7
33	3
34	5
35	2
36	3
37	1
38	3
39	2
40	2
41	0
42	1
43	1
44	2
45	1
46	4
47	3
48	5
49	2
50	4
51	2
52	4
53	2
54	5
55	3
56	7
57	4
58	8
59	4
60	10
61	6
62	11
63	5
64	11
65	6
66	10
67	4
68	8
69	4
70	7
71	3
72	5
73	2
74	4
75	2
76	4
77	2
78	5
79	3
80	4
81	1
82	2
83	1
84	1
85	0
86	2
87	2
88	3
89	1
90	3
91	2
92	5
93	3
94	7
95	4
96	8
97	4
98	7
99	3
100	6
101	3
102	6
103	3

n	a(n)
1	0
2	1
3	1
4	1
5	0
6	2
7	2
8	2
9	0
10	1
11	1
12	2
13	1
14	4
15	3
16	4
17	1
18	2
19	1
20	1
21	0
22	2
23	2
24	3
25	1
26	3
27	2
28	5
29	3
30	7
31	4
32	7
33	3
34	5
35	2
36	3
37	1
38	3
39	2
40	2
41	0
42	1
43	1
44	2
45	1
46	4
47	3
48	5
49	2
50	4
51	2
52	4
53	2
54	5
55	3
56	7
57	4
58	8
59	4
60	10
61	6
62	11
63	5
64	11
65	6
66	10
67	4
68	8
69	4
70	7
71	3
72	5
73	2
74	4
75	2
76	4
77	2
78	5
79	3
80	4
81	1
82	2
83	1
84	1
85	0
86	2
87	2
88	3
89	1
90	3
91	2
92	5
93	3
94	7
95	4
96	8
97	4
98	7
99	3
100	6
101	3
102	6
103	3

n	a(n)
1	0
2	1
3	1
4	1
5	0
6	2
7	2
8	2
9	0
10	1
11	1
12	2
13	1
14	4
15	3
16	4
17	1
18	2
19	1
20	1
21	0
22	2
23	2
24	3
25	1
26	3
27	2
28	5
29	3
30	7
31	4
32	7
33	3
34	5
35	2
36	3
37	1
38	3
39	2
40	2
41	0
42	1
43	1
44	2
45	1
46	4
47	3
48	5
49	2
50	4
51	2
52	4
53	2
54	5
55	3
56	7
57	4
58	8
59	4
60	10
61	6
62	11
63	5
64	11
65	6
66	10
67	4
68	8
69	4
70	7
71	3
72	5
73	2
74	4
75	2
76	4
77	2
78	5
79	3
80	4
81	1
82	2
83	1
84	1
85	0
86	2
87	2
88	3
89	1
90	3
91	2
92	5
93	3
94	7
95	4
96	8
97	4
98	7
99	3
100	6
101	3
102	6
103	3