A381178 - cp's OEIS frontend

A381178 Irregular triangle read by rows, where row n lists the elements of the multiset of bases and exponents (including exponents = 1) in the prime factorization of n.

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

[1, 2, 1, 3, 2, 2, 1, 5, 1, 1, 2, 3, 1, 7, 2, 3, 2, 3, 1, 1, 2, 5, 1, 11, 1, 2, 2, 3, 1, 13, 1, 1, 2, 7, 1, 1, 3, 5, 2, 4, 1, 17, 1, 2, 2, 3, 1, 19, 1, 2, 2, 5, 1, 1, 3, 7, 1, 1, 2, 11, 1, 23, 1, 2, 3, 3, 2, 5, 1, 1, 2, 13, 3, 3, 1, 2, 2, 7, 1, 29, 1, 1, 1, 2, 3, 5, 1, 31]

cp's OEIS Frontend

A381178 Irregular triangle read by rows, where row n lists the elements of the multiset of bases and exponents (including exponents = 1) in the prime factorization of n.

Table of values

List of values

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

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

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