A377488 - cp's OEIS frontend

A377488 Irregular triangle r ead by rows where row n lists powers p^k for primes p | n such that k = floor(log n/log p).

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

[1, 2, 3, 4, 5, 3, 4, 7, 8, 9, 5, 8, 11, 8, 9, 13, 7, 8, 5, 9, 16, 17, 9, 16, 19, 5, 16, 7, 9, 11, 16, 23, 9, 16, 25, 13, 16, 27, 7, 16, 29, 16, 25, 27, 31, 32, 11, 27, 17, 32, 7, 25, 27, 32, 37, 19, 32, 13, 27, 25, 32, 41, 7, 27, 32, 43, 11, 32, 25, 27, 23, 32]

cp's OEIS Frontend

A377488 Irregular triangle r ead by rows where row n lists powers p^k for primes p | n such that k = floor(log n/log p).

Table of values

List of values

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

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

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