A285760 - cp's OEIS frontend

A285760 a(n) = a(n - 2 - a(n - 1)) + a(n - 2 - a(n - 4)), with a(1) = 1, a(2) = 1, a(3) = 2, a(4) = 2.

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

[1, 1, 2, 2, 2, 3, 3, 4, 4, 4, 5, 5, 6, 7, 7, 7, 8, 8, 8, 9, 9, 10, 11, 11, 12, 12, 13, 13, 14, 14, 14, 15, 15, 16, 16, 16, 17, 17, 18, 19, 19, 20, 20, 21, 21, 22, 23, 23, 23, 24, 24, 25, 25, 26, 27, 27, 27, 28, 28, 28, 29, 29, 30, 31, 31]

cp's OEIS Frontend

A285760 a(n) = a(n - 2 - a(n - 1)) + a(n - 2 - a(n - 4)), with a(1) = 1, a(2) = 1, a(3) = 2, a(4) = 2.

Table of values

List of values

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

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

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