A205402 - cp's OEIS frontend

A205402 Least k such that n divides s(k)-s(j) for some j < k, where s(j) = floor((j+1)^2/2)/2 (quarter-squares).

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

[2, 3, 3, 4, 4, 6, 5, 5, 8, 6, 6, 7, 9, 7, 7, 8, 11, 8, 8, 11, 9, 12, 9, 9, 14, 10, 11, 10, 10, 11, 14, 11, 12, 11, 11, 12, 13, 12, 15, 12, 12, 16, 13, 14, 13, 20, 13, 13, 19, 14, 17, 14, 20, 14, 14, 16, 21, 15, 25, 15, 17, 15, 15, 19, 17, 16, 28, 16, 17, 16, 16, 17, 26]

cp's OEIS Frontend

A205402 Least k such that n divides s(k)-s(j) for some j < k, where s(j) = floor((j+1)^2/2)/2 (quarter-squares).

Table of values

List of values

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

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

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