A205138 - cp's OEIS frontend

A205138 Least k such that n divides s(k)-s(j) for some j satisfying 1<=j where s(j)=j(3j-1)/2, the j-th pentagonal number.

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

[2, 2, 4, 2, 4, 5, 3, 6, 10, 4, 3, 7, 5, 8, 5, 6, 4, 10, 7, 8, 4, 8, 5, 7, 6, 13, 28, 9, 6, 5, 11, 22, 9, 5, 7, 10, 13, 18, 6, 8, 8, 11, 15, 15, 13, 6, 9, 7, 13, 6, 13, 15, 10, 29, 10, 9, 8, 7, 11, 15]

cp's OEIS Frontend

A205138 Least k such that n divides s(k)-s(j) for some j satisfying 1<=j where s(j)=j(3j-1)/2, the j-th pentagonal number.

Table of values

List of values

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

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

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