A375970 - cp's OEIS frontend

A375970 a(n) is the largest number k such that k^2 divides the square pyramidal number A000330(n).

n	a(n)
1	1
2	1
3	1
4	1
5	1
6	1
7	2
8	2
9	1
10	1
11	1
12	5
13	3
14	1
15	2
16	2
17	1
18	1
19	1
20	1
21	1
22	1
23	2
24	70
25	5
26	3
27	3
28	1
29	1
30	1
31	4
32	4
33	1
34	1
35	1
36	1
37	5
38	1
39	2
40	6
41	1
42	1
43	1
44	1
45	1
46	1
47	2
48	14
49	35
50	5
51	1
52	1
53	3
54	3
55	2
56	2
57	1
58	1
59	1
60	11
61	1
62	5
63	4
64	4
65	1
66	1
67	3
68	1
69	1
70	1
71	2
72	2
73	7
74	5
75	5
76	1
77	1
78	1
79	2
80	6
81	3
82	1
83	1
84	13
85	1
86	1
87	10
88	2
89	1
90	1
91	1
92	1
93	1
94	3
95	4
96	4
97	7

[1, 1, 1, 1, 1, 1, 2, 2, 1, 1, 1, 5, 3, 1, 2, 2, 1, 1, 1, 1, 1, 1, 2, 70, 5, 3, 3, 1, 1, 1, 4, 4, 1, 1, 1, 1, 5, 1, 2, 6, 1, 1, 1, 1, 1, 1, 2, 14, 35, 5, 1, 1, 3, 3, 2, 2, 1, 1, 1, 11, 1, 5, 4, 4, 1, 1, 3, 1, 1, 1, 2, 2, 7, 5, 5, 1, 1, 1, 2, 6, 3, 1, 1, 13, 1, 1, 10, 2, 1, 1, 1, 1, 1, 3, 4, 4, 7]

cp's OEIS Frontend

A375970 a(n) is the largest number k such that k^2 divides the square pyramidal number A000330(n).

Table of values

List of values

n	a(n)
1	1
2	1
3	1
4	1
5	1
6	1
7	2
8	2
9	1
10	1
11	1
12	5
13	3
14	1
15	2
16	2
17	1
18	1
19	1
20	1
21	1
22	1
23	2
24	70
25	5
26	3
27	3
28	1
29	1
30	1
31	4
32	4
33	1
34	1
35	1
36	1
37	5
38	1
39	2
40	6
41	1
42	1
43	1
44	1
45	1
46	1
47	2
48	14
49	35
50	5
51	1
52	1
53	3
54	3
55	2
56	2
57	1
58	1
59	1
60	11
61	1
62	5
63	4
64	4
65	1
66	1
67	3
68	1
69	1
70	1
71	2
72	2
73	7
74	5
75	5
76	1
77	1
78	1
79	2
80	6
81	3
82	1
83	1
84	13
85	1
86	1
87	10
88	2
89	1
90	1
91	1
92	1
93	1
94	3
95	4
96	4
97	7

n	a(n)
1	1
2	1
3	1
4	1
5	1
6	1
7	2
8	2
9	1
10	1
11	1
12	5
13	3
14	1
15	2
16	2
17	1
18	1
19	1
20	1
21	1
22	1
23	2
24	70
25	5
26	3
27	3
28	1
29	1
30	1
31	4
32	4
33	1
34	1
35	1
36	1
37	5
38	1
39	2
40	6
41	1
42	1
43	1
44	1
45	1
46	1
47	2
48	14
49	35
50	5
51	1
52	1
53	3
54	3
55	2
56	2
57	1
58	1
59	1
60	11
61	1
62	5
63	4
64	4
65	1
66	1
67	3
68	1
69	1
70	1
71	2
72	2
73	7
74	5
75	5
76	1
77	1
78	1
79	2
80	6
81	3
82	1
83	1
84	13
85	1
86	1
87	10
88	2
89	1
90	1
91	1
92	1
93	1
94	3
95	4
96	4
97	7

n	a(n)
1	1
2	1
3	1
4	1
5	1
6	1
7	2
8	2
9	1
10	1
11	1
12	5
13	3
14	1
15	2
16	2
17	1
18	1
19	1
20	1
21	1
22	1
23	2
24	70
25	5
26	3
27	3
28	1
29	1
30	1
31	4
32	4
33	1
34	1
35	1
36	1
37	5
38	1
39	2
40	6
41	1
42	1
43	1
44	1
45	1
46	1
47	2
48	14
49	35
50	5
51	1
52	1
53	3
54	3
55	2
56	2
57	1
58	1
59	1
60	11
61	1
62	5
63	4
64	4
65	1
66	1
67	3
68	1
69	1
70	1
71	2
72	2
73	7
74	5
75	5
76	1
77	1
78	1
79	2
80	6
81	3
82	1
83	1
84	13
85	1
86	1
87	10
88	2
89	1
90	1
91	1
92	1
93	1
94	3
95	4
96	4
97	7