A362248 - cp's OEIS frontend

A362248 a(n) is the number of locations 1..n-1 which can reach i=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	1
6	5
7	6
8	7
9	1
10	1
11	2
12	11
13	1
14	13
15	14
16	15
17	1
18	1
19	2
20	3
21	1
22	5
23	6
24	23
25	1
26	1
27	2
28	27
29	1
30	29
31	30
32	31
33	1
34	1
35	2
36	3
37	1
38	5
39	6
40	7
41	1
42	1
43	2
44	11
45	1
46	13
47	14
48	47
49	1
50	1
51	2
52	3
53	1
54	5
55	6
56	55
57	1
58	1
59	2
60	59
61	1
62	61
63	62
64	63
65	1
66	1
67	2
68	3
69	1
70	5
71	6
72	7
73	1
74	1
75	2
76	11
77	1
78	13
79	14
80	15

[1, 1, 2, 3, 1, 5, 6, 7, 1, 1, 2, 11, 1, 13, 14, 15, 1, 1, 2, 3, 1, 5, 6, 23, 1, 1, 2, 27, 1, 29, 30, 31, 1, 1, 2, 3, 1, 5, 6, 7, 1, 1, 2, 11, 1, 13, 14, 47, 1, 1, 2, 3, 1, 5, 6, 55, 1, 1, 2, 59, 1, 61, 62, 63, 1, 1, 2, 3, 1, 5, 6, 7, 1, 1, 2, 11, 1, 13, 14, 15]

cp's OEIS Frontend

A362248 a(n) is the number of locations 1..n-1 which can reach i=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	1
6	5
7	6
8	7
9	1
10	1
11	2
12	11
13	1
14	13
15	14
16	15
17	1
18	1
19	2
20	3
21	1
22	5
23	6
24	23
25	1
26	1
27	2
28	27
29	1
30	29
31	30
32	31
33	1
34	1
35	2
36	3
37	1
38	5
39	6
40	7
41	1
42	1
43	2
44	11
45	1
46	13
47	14
48	47
49	1
50	1
51	2
52	3
53	1
54	5
55	6
56	55
57	1
58	1
59	2
60	59
61	1
62	61
63	62
64	63
65	1
66	1
67	2
68	3
69	1
70	5
71	6
72	7
73	1
74	1
75	2
76	11
77	1
78	13
79	14
80	15

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

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