A361383 - cp's OEIS frontend

A361383 a(n) is the number of locations 1..n-1 which can be reached starting from location i=a(n-1), where jumps from location i to i +- a(i) are permitted (within 1..n-1); a(1)=1. See example.

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

[1, 1, 2, 3, 3, 4, 5, 4, 7, 7, 7, 7, 8, 8, 8, 8, 8, 8, 8, 15, 16, 15, 16, 15, 18, 17, 18, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 22, 24, 22, 24, 23, 24, 26, 26, 26, 26, 26, 26, 26, 26, 26, 29, 32, 33, 35, 32, 35, 32, 35, 32, 35, 32, 35, 32, 36, 35, 37]

cp's OEIS Frontend

A361383 a(n) is the number of locations 1..n-1 which can be reached starting from location i=a(n-1), where jumps from location i to i +- a(i) are permitted (within 1..n-1); a(1)=1. See example.

Table of values

List of values

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

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

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