A205406 - cp's OEIS frontend

A205406 a(n) = s(k)-s(j), where (k,j) is the least pair for which n divides s(k)-s(j), and s(j) = floor((j+1)^2/2)/2.

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	8
9	18
10	10
11	11
12	12
13	13
14	14
15	15
16	16
17	34
18	18
19	19
20	20
21	21
22	22
23	23
24	24
25	50
26	26
27	27
28	28
29	29
30	30
31	31
32	32
33	33
34	34
35	35
36	36
37	37
38	38
39	39
40	40
41	41
42	42
43	43
44	44
45	45
46	46
47	47
48	48
49	98
50	50
51	51
52	52
53	106
54	54
55	55
56	56
57	57
58	58
59	59
60	60
61	61
62	62
63	63
64	64
65	65
66	66
67	201
68	68

[1, 2, 3, 4, 5, 6, 7, 8, 18, 10, 11, 12, 13, 14, 15, 16, 34, 18, 19, 20, 21, 22, 23, 24, 50, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 98, 50, 51, 52, 106, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 201, 68]

cp's OEIS Frontend

A205406 a(n) = s(k)-s(j), where (k,j) is the least pair for which n divides s(k)-s(j), and s(j) = floor((j+1)^2/2)/2.

Table of values

List of values

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	8
9	18
10	10
11	11
12	12
13	13
14	14
15	15
16	16
17	34
18	18
19	19
20	20
21	21
22	22
23	23
24	24
25	50
26	26
27	27
28	28
29	29
30	30
31	31
32	32
33	33
34	34
35	35
36	36
37	37
38	38
39	39
40	40
41	41
42	42
43	43
44	44
45	45
46	46
47	47
48	48
49	98
50	50
51	51
52	52
53	106
54	54
55	55
56	56
57	57
58	58
59	59
60	60
61	61
62	62
63	63
64	64
65	65
66	66
67	201
68	68

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	8
9	18
10	10
11	11
12	12
13	13
14	14
15	15
16	16
17	34
18	18
19	19
20	20
21	21
22	22
23	23
24	24
25	50
26	26
27	27
28	28
29	29
30	30
31	31
32	32
33	33
34	34
35	35
36	36
37	37
38	38
39	39
40	40
41	41
42	42
43	43
44	44
45	45
46	46
47	47
48	48
49	98
50	50
51	51
52	52
53	106
54	54
55	55
56	56
57	57
58	58
59	59
60	60
61	61
62	62
63	63
64	64
65	65
66	66
67	201
68	68

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	8
9	18
10	10
11	11
12	12
13	13
14	14
15	15
16	16
17	34
18	18
19	19
20	20
21	21
22	22
23	23
24	24
25	50
26	26
27	27
28	28
29	29
30	30
31	31
32	32
33	33
34	34
35	35
36	36
37	37
38	38
39	39
40	40
41	41
42	42
43	43
44	44
45	45
46	46
47	47
48	48
49	98
50	50
51	51
52	52
53	106
54	54
55	55
56	56
57	57
58	58
59	59
60	60
61	61
62	62
63	63
64	64
65	65
66	66
67	201
68	68