A329631 - cp's OEIS frontend

A329631 Irregular triangle read by rows where row n lists the prime indices of the n-th squarefree number.

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

[1, 2, 3, 1, 2, 4, 1, 3, 5, 6, 1, 4, 2, 3, 7, 8, 2, 4, 1, 5, 9, 1, 6, 10, 1, 2, 3, 11, 2, 5, 1, 7, 3, 4, 12, 1, 8, 2, 6, 13, 1, 2, 4, 14, 1, 9, 15, 2, 7, 16, 3, 5, 2, 8, 1, 10, 17, 18, 1, 11, 3, 6, 1, 2, 5, 19, 2, 9, 1, 3, 4, 20, 21, 1, 12, 4, 5, 1, 2, 6]

cp's OEIS Frontend

A329631 Irregular triangle read by rows where row n lists the prime indices of the n-th squarefree number.

Table of values

List of values

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

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

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