A377485 - cp's OEIS frontend

A377485 Irregular triangle where row n lists powers p^k of primes p | n such that p^k <= n and k > 0.

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

[1, 2, 3, 2, 4, 5, 2, 3, 4, 7, 2, 4, 8, 3, 9, 2, 4, 5, 8, 11, 2, 3, 4, 8, 9, 13, 2, 4, 7, 8, 3, 5, 9, 2, 4, 8, 16, 17, 2, 3, 4, 8, 9, 16, 19, 2, 4, 5, 8, 16, 3, 7, 9, 2, 4, 8, 11, 16, 23, 2, 3, 4, 8, 9, 16, 5, 25, 2, 4, 8, 13, 16, 3, 9, 27, 2, 4, 7, 8, 16, 29]

cp's OEIS Frontend

A377485 Irregular triangle where row n lists powers p^k of primes p | n such that p^k <= n and k > 0.

Table of values

List of values

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

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

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