A048276 - cp's OEIS frontend

A048276 a(n) = number of squarefree numbers among C(n,k), k=0..n.

n	a(n)
0	1
1	2
2	3
3	4
4	3
5	6
6	6
7	8
8	3
9	2
10	6
11	12
12	4
13	10
14	12
15	14
16	2
17	6
18	2
19	8
20	8
21	10
22	12
23	24
24	4
25	4
26	8
27	2
28	4
29	12
30	6
31	12
32	2
33	4
34	8
35	8
36	2
37	8
38	14
39	12
40	4
41	12
42	14
43	26
44	16
45	8
46	20
47	42
48	2
49	2
50	2
51	4
52	6
53	18
54	4
55	6
56	2
57	6
58	10
59	22
60	8
61	26
62	40
63	8
64	2
65	4
66	6
67	8
68	8
69	16
70	12
71	18
72	2
73	8
74	18
75	4
76	6
77	14
78	18
79	34
80	2
81	2
82	4
83	6
84	4
85	10
86	12
87	16
88	4

[1, 2, 3, 4, 3, 6, 6, 8, 3, 2, 6, 12, 4, 10, 12, 14, 2, 6, 2, 8, 8, 10, 12, 24, 4, 4, 8, 2, 4, 12, 6, 12, 2, 4, 8, 8, 2, 8, 14, 12, 4, 12, 14, 26, 16, 8, 20, 42, 2, 2, 2, 4, 6, 18, 4, 6, 2, 6, 10, 22, 8, 26, 40, 8, 2, 4, 6, 8, 8, 16, 12, 18, 2, 8, 18, 4, 6, 14, 18, 34, 2, 2, 4, 6, 4, 10, 12, 16, 4]

cp's OEIS Frontend

A048276 a(n) = number of squarefree numbers among C(n,k), k=0..n.

Table of values

List of values

n	a(n)
0	1
1	2
2	3
3	4
4	3
5	6
6	6
7	8
8	3
9	2
10	6
11	12
12	4
13	10
14	12
15	14
16	2
17	6
18	2
19	8
20	8
21	10
22	12
23	24
24	4
25	4
26	8
27	2
28	4
29	12
30	6
31	12
32	2
33	4
34	8
35	8
36	2
37	8
38	14
39	12
40	4
41	12
42	14
43	26
44	16
45	8
46	20
47	42
48	2
49	2
50	2
51	4
52	6
53	18
54	4
55	6
56	2
57	6
58	10
59	22
60	8
61	26
62	40
63	8
64	2
65	4
66	6
67	8
68	8
69	16
70	12
71	18
72	2
73	8
74	18
75	4
76	6
77	14
78	18
79	34
80	2
81	2
82	4
83	6
84	4
85	10
86	12
87	16
88	4

n	a(n)
0	1
1	2
2	3
3	4
4	3
5	6
6	6
7	8
8	3
9	2
10	6
11	12
12	4
13	10
14	12
15	14
16	2
17	6
18	2
19	8
20	8
21	10
22	12
23	24
24	4
25	4
26	8
27	2
28	4
29	12
30	6
31	12
32	2
33	4
34	8
35	8
36	2
37	8
38	14
39	12
40	4
41	12
42	14
43	26
44	16
45	8
46	20
47	42
48	2
49	2
50	2
51	4
52	6
53	18
54	4
55	6
56	2
57	6
58	10
59	22
60	8
61	26
62	40
63	8
64	2
65	4
66	6
67	8
68	8
69	16
70	12
71	18
72	2
73	8
74	18
75	4
76	6
77	14
78	18
79	34
80	2
81	2
82	4
83	6
84	4
85	10
86	12
87	16
88	4

n	a(n)
0	1
1	2
2	3
3	4
4	3
5	6
6	6
7	8
8	3
9	2
10	6
11	12
12	4
13	10
14	12
15	14
16	2
17	6
18	2
19	8
20	8
21	10
22	12
23	24
24	4
25	4
26	8
27	2
28	4
29	12
30	6
31	12
32	2
33	4
34	8
35	8
36	2
37	8
38	14
39	12
40	4
41	12
42	14
43	26
44	16
45	8
46	20
47	42
48	2
49	2
50	2
51	4
52	6
53	18
54	4
55	6
56	2
57	6
58	10
59	22
60	8
61	26
62	40
63	8
64	2
65	4
66	6
67	8
68	8
69	16
70	12
71	18
72	2
73	8
74	18
75	4
76	6
77	14
78	18
79	34
80	2
81	2
82	4
83	6
84	4
85	10
86	12
87	16
88	4