A302170 - cp's OEIS frontend

A302170 Irregular triangle T(n,k) read by rows: first row is 1, n-th row (n > 1) lists distinct prime factors of n in decreasing order.

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

[1, 2, 3, 2, 5, 3, 2, 7, 2, 3, 5, 2, 11, 3, 2, 13, 7, 2, 5, 3, 2, 17, 3, 2, 19, 5, 2, 7, 3, 11, 2, 23, 3, 2, 5, 13, 2, 3, 7, 2, 29, 5, 3, 2, 31, 2, 11, 3, 17, 2, 7, 5, 3, 2, 37, 19, 2, 13, 3, 5, 2, 41, 7, 3, 2, 43, 11, 2, 5, 3, 23, 2, 47, 3, 2, 7, 5, 2, 17, 3, 13, 2, 53, 3, 2, 11, 5, 7, 2, 19, 3, 29, 2, 59, 5, 3, 2, 61, 31, 2]

cp's OEIS Frontend

A302170 Irregular triangle T(n,k) read by rows: first row is 1, n-th row (n > 1) lists distinct prime factors of n in decreasing order.

Table of values

List of values

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

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

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