A317585 - cp's OEIS frontend

A317585 a(n) = number of k with 1 <= k <= n-1 such that abs(a(k) - a(n-k)) <= 2.

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

[0, 1, 2, 3, 2, 5, 4, 3, 2, 9, 6, 7, 6, 5, 2, 5, 6, 9, 4, 9, 2, 13, 12, 13, 8, 7, 6, 11, 6, 13, 2, 9, 8, 7, 8, 13, 4, 13, 6, 15, 6, 11, 12, 13, 16, 23, 8, 13, 0, 17, 14, 25, 14, 13, 8, 7, 6, 19, 8, 19, 6, 13, 4, 19, 12, 25, 20, 23, 10, 19, 10, 21, 16, 23, 10]

cp's OEIS Frontend

A317585 a(n) = number of k with 1 <= k <= n-1 such that abs(a(k) - a(n-k)) <= 2.

Table of values

List of values

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

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

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