A205004 - cp's OEIS frontend

A205004 Least k(k+1)/2 such that n divides k(k+1)/2-j(j+1)/2 for some j

n	a(n)
1	3
2	3
3	6
4	10
5	6
6	15
7	10
8	36
9	10
10	21
11	21
12	15
13	28
14	15
15	21
16	136
17	45
18	21
19	55
20	21
21	36
22	28
23	78
24	45
25	28
26	36
27	28
28	66
29	120
30	36
31	136
32	528
33	36
34	55
35	36
36	78
37	190
38	66
39	45
40	55
41	231
42	45
43	253
44	45
45	55
46	91
47	300
48	153
49	55
50	78
51	66
52	55
53	378
54	55
55	91
56	66
57	78
58	136
59	465
60	66

[3, 3, 6, 10, 6, 15, 10, 36, 10, 21, 21, 15, 28, 15, 21, 136, 45, 21, 55, 21, 36, 28, 78, 45, 28, 36, 28, 66, 120, 36, 136, 528, 36, 55, 36, 78, 190, 66, 45, 55, 231, 45, 253, 45, 55, 91, 300, 153, 55, 78, 66, 55, 378, 55, 91, 66, 78, 136, 465, 66]

cp's OEIS Frontend

A205004 Least k(k+1)/2 such that n divides k(k+1)/2-j(j+1)/2 for some j

Table of values

List of values

n	a(n)
1	3
2	3
3	6
4	10
5	6
6	15
7	10
8	36
9	10
10	21
11	21
12	15
13	28
14	15
15	21
16	136
17	45
18	21
19	55
20	21
21	36
22	28
23	78
24	45
25	28
26	36
27	28
28	66
29	120
30	36
31	136
32	528
33	36
34	55
35	36
36	78
37	190
38	66
39	45
40	55
41	231
42	45
43	253
44	45
45	55
46	91
47	300
48	153
49	55
50	78
51	66
52	55
53	378
54	55
55	91
56	66
57	78
58	136
59	465
60	66

n	a(n)
1	3
2	3
3	6
4	10
5	6
6	15
7	10
8	36
9	10
10	21
11	21
12	15
13	28
14	15
15	21
16	136
17	45
18	21
19	55
20	21
21	36
22	28
23	78
24	45
25	28
26	36
27	28
28	66
29	120
30	36
31	136
32	528
33	36
34	55
35	36
36	78
37	190
38	66
39	45
40	55
41	231
42	45
43	253
44	45
45	55
46	91
47	300
48	153
49	55
50	78
51	66
52	55
53	378
54	55
55	91
56	66
57	78
58	136
59	465
60	66

n	a(n)
1	3
2	3
3	6
4	10
5	6
6	15
7	10
8	36
9	10
10	21
11	21
12	15
13	28
14	15
15	21
16	136
17	45
18	21
19	55
20	21
21	36
22	28
23	78
24	45
25	28
26	36
27	28
28	66
29	120
30	36
31	136
32	528
33	36
34	55
35	36
36	78
37	190
38	66
39	45
40	55
41	231
42	45
43	253
44	45
45	55
46	91
47	300
48	153
49	55
50	78
51	66
52	55
53	378
54	55
55	91
56	66
57	78
58	136
59	465
60	66