A109709 - cp's OEIS frontend

A109709 Triangle in which n-th row gives the prime factors of the n-th composite number with repetition.

n	a(n)
1	2
2	2
3	2
4	3
5	2
6	2
7	2
8	3
9	3
10	2
11	5
12	2
13	2
14	3
15	2
16	7
17	3
18	5
19	2
20	2
21	2
22	2
23	2
24	3
25	3
26	2
27	2
28	5
29	3
30	7
31	2
32	11
33	2
34	2
35	2
36	3
37	5
38	5
39	2
40	13
41	3
42	3
43	3
44	2
45	2
46	7
47	2
48	3
49	5
50	2
51	2
52	2
53	2
54	2
55	3
56	11
57	2
58	17
59	5
60	7
61	2
62	2
63	3
64	3
65	2
66	19
67	3
68	13
69	2
70	2
71	2
72	5
73	2
74	3
75	7
76	2
77	2
78	11
79	3
80	3
81	5
82	2
83	23
84	2
85	2
86	2
87	2
88	3
89	7
90	7
91	2
92	5
93	5
94	3
95	17
96	2
97	2
98	13
99	2
100	3
101	3
102	3

[2, 2, 2, 3, 2, 2, 2, 3, 3, 2, 5, 2, 2, 3, 2, 7, 3, 5, 2, 2, 2, 2, 2, 3, 3, 2, 2, 5, 3, 7, 2, 11, 2, 2, 2, 3, 5, 5, 2, 13, 3, 3, 3, 2, 2, 7, 2, 3, 5, 2, 2, 2, 2, 2, 3, 11, 2, 17, 5, 7, 2, 2, 3, 3, 2, 19, 3, 13, 2, 2, 2, 5, 2, 3, 7, 2, 2, 11, 3, 3, 5, 2, 23, 2, 2, 2, 2, 3, 7, 7, 2, 5, 5, 3, 17, 2, 2, 13, 2, 3, 3, 3]

cp's OEIS Frontend

A109709 Triangle in which n-th row gives the prime factors of the n-th composite number with repetition.

Table of values

List of values

n	a(n)
1	2
2	2
3	2
4	3
5	2
6	2
7	2
8	3
9	3
10	2
11	5
12	2
13	2
14	3
15	2
16	7
17	3
18	5
19	2
20	2
21	2
22	2
23	2
24	3
25	3
26	2
27	2
28	5
29	3
30	7
31	2
32	11
33	2
34	2
35	2
36	3
37	5
38	5
39	2
40	13
41	3
42	3
43	3
44	2
45	2
46	7
47	2
48	3
49	5
50	2
51	2
52	2
53	2
54	2
55	3
56	11
57	2
58	17
59	5
60	7
61	2
62	2
63	3
64	3
65	2
66	19
67	3
68	13
69	2
70	2
71	2
72	5
73	2
74	3
75	7
76	2
77	2
78	11
79	3
80	3
81	5
82	2
83	23
84	2
85	2
86	2
87	2
88	3
89	7
90	7
91	2
92	5
93	5
94	3
95	17
96	2
97	2
98	13
99	2
100	3
101	3
102	3

n	a(n)
1	2
2	2
3	2
4	3
5	2
6	2
7	2
8	3
9	3
10	2
11	5
12	2
13	2
14	3
15	2
16	7
17	3
18	5
19	2
20	2
21	2
22	2
23	2
24	3
25	3
26	2
27	2
28	5
29	3
30	7
31	2
32	11
33	2
34	2
35	2
36	3
37	5
38	5
39	2
40	13
41	3
42	3
43	3
44	2
45	2
46	7
47	2
48	3
49	5
50	2
51	2
52	2
53	2
54	2
55	3
56	11
57	2
58	17
59	5
60	7
61	2
62	2
63	3
64	3
65	2
66	19
67	3
68	13
69	2
70	2
71	2
72	5
73	2
74	3
75	7
76	2
77	2
78	11
79	3
80	3
81	5
82	2
83	23
84	2
85	2
86	2
87	2
88	3
89	7
90	7
91	2
92	5
93	5
94	3
95	17
96	2
97	2
98	13
99	2
100	3
101	3
102	3

n	a(n)
1	2
2	2
3	2
4	3
5	2
6	2
7	2
8	3
9	3
10	2
11	5
12	2
13	2
14	3
15	2
16	7
17	3
18	5
19	2
20	2
21	2
22	2
23	2
24	3
25	3
26	2
27	2
28	5
29	3
30	7
31	2
32	11
33	2
34	2
35	2
36	3
37	5
38	5
39	2
40	13
41	3
42	3
43	3
44	2
45	2
46	7
47	2
48	3
49	5
50	2
51	2
52	2
53	2
54	2
55	3
56	11
57	2
58	17
59	5
60	7
61	2
62	2
63	3
64	3
65	2
66	19
67	3
68	13
69	2
70	2
71	2
72	5
73	2
74	3
75	7
76	2
77	2
78	11
79	3
80	3
81	5
82	2
83	23
84	2
85	2
86	2
87	2
88	3
89	7
90	7
91	2
92	5
93	5
94	3
95	17
96	2
97	2
98	13
99	2
100	3
101	3
102	3