A205395 - cp's OEIS frontend

A205395 The index j such that n divides s(k)-s(j) for some j, where s(j)=ceiling(j^2/2), and k is the least index for which such an index j exists.

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

[1, 1, 2, 1, 4, 2, 1, 3, 3, 4, 2, 1, 3, 6, 2, 2, 1, 3, 5, 3, 4, 10, 2, 1, 7, 12, 3, 5, 8, 2, 1, 6, 4, 16, 2, 3, 5, 18, 2, 1, 12, 4, 6, 9, 3, 22, 7, 2, 1, 5, 14, 11, 4, 6, 6, 3, 9, 28, 2, 1, 19, 30, 10, 4, 8, 8, 3, 15, 20, 2, 1, 5, 7, 36, 10, 17, 4, 10, 3, 3]

cp's OEIS Frontend

A205395 The index j such that n divides s(k)-s(j) for some j, where s(j)=ceiling(j^2/2), and k is the least index for which such an index j exists.

Table of values

List of values

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

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

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