A336964 - cp's OEIS frontend

A336964 Irregular triangle in which first row is 1, n-th row (n > 1) lists distinct prime numbers in the prime tower factorization of n.

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

[1, 2, 3, 2, 5, 2, 3, 7, 2, 3, 2, 3, 2, 5, 11, 2, 3, 13, 2, 7, 3, 5, 2, 17, 2, 3, 19, 2, 5, 3, 7, 2, 11, 23, 2, 3, 2, 5, 2, 13, 3, 2, 7, 29, 2, 3, 5, 31, 2, 5, 3, 11, 2, 17, 5, 7, 2, 3, 37, 2, 19, 3, 13, 2, 3, 5, 41, 2, 3, 7, 43, 2, 11, 2, 3, 5, 2, 23, 47, 2, 3]

cp's OEIS Frontend

A336964 Irregular triangle in which first row is 1, n-th row (n > 1) lists distinct prime numbers in the prime tower factorization of n.

Table of values

List of values

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

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

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