A336870 - cp's OEIS frontend

A336870 Irregular triangle read by rows where T(n,k) is the number of divisors d of the superprimorial A006939(n) with k prime factors (counting multiplicity), such that d and A006939(n)/d both have distinct prime multiplicities.

n	a(n)
0	1
1	1
2	1
3	1
4	1
5	1
6	1
7	1
8	1
9	1
10	4
11	1
12	1
13	1
14	1
15	1
16	1
17	4
18	4
19	2
20	4
21	4
22	1
23	1
24	1
25	1
26	1
27	1
28	4
29	4
30	7
31	7
32	7
33	7
34	7
35	7
36	4
37	4
38	1
39	1
40	1
41	1
42	1
43	1
44	4
45	4
46	7
47	18
48	10
49	10
50	15
51	21
52	21
53	15
54	10
55	10
56	18
57	7
58	4
59	4
60	1
61	1
62	1
63	1
64	1
65	1
66	4
67	4
68	7
69	18
70	23
71	15
72	20
73	37
74	35
75	40
76	46
77	32
78	46
79	40
80	35
81	37
82	20
83	15
84	23
85	18
86	7
87	4
88	4
89	1
90	1
91	1

[1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 4, 1, 1, 1, 1, 1, 1, 4, 4, 2, 4, 4, 1, 1, 1, 1, 1, 1, 4, 4, 7, 7, 7, 7, 7, 7, 4, 4, 1, 1, 1, 1, 1, 1, 4, 4, 7, 18, 10, 10, 15, 21, 21, 15, 10, 10, 18, 7, 4, 4, 1, 1, 1, 1, 1, 1, 4, 4, 7, 18, 23, 15, 20, 37, 35, 40, 46, 32, 46, 40, 35, 37, 20, 15, 23, 18, 7, 4, 4, 1, 1, 1]

cp's OEIS Frontend

A336870 Irregular triangle read by rows where T(n,k) is the number of divisors d of the superprimorial A006939(n) with k prime factors (counting multiplicity), such that d and A006939(n)/d both have distinct prime multiplicities.

Table of values

List of values

n	a(n)
0	1
1	1
2	1
3	1
4	1
5	1
6	1
7	1
8	1
9	1
10	4
11	1
12	1
13	1
14	1
15	1
16	1
17	4
18	4
19	2
20	4
21	4
22	1
23	1
24	1
25	1
26	1
27	1
28	4
29	4
30	7
31	7
32	7
33	7
34	7
35	7
36	4
37	4
38	1
39	1
40	1
41	1
42	1
43	1
44	4
45	4
46	7
47	18
48	10
49	10
50	15
51	21
52	21
53	15
54	10
55	10
56	18
57	7
58	4
59	4
60	1
61	1
62	1
63	1
64	1
65	1
66	4
67	4
68	7
69	18
70	23
71	15
72	20
73	37
74	35
75	40
76	46
77	32
78	46
79	40
80	35
81	37
82	20
83	15
84	23
85	18
86	7
87	4
88	4
89	1
90	1
91	1

n	a(n)
0	1
1	1
2	1
3	1
4	1
5	1
6	1
7	1
8	1
9	1
10	4
11	1
12	1
13	1
14	1
15	1
16	1
17	4
18	4
19	2
20	4
21	4
22	1
23	1
24	1
25	1
26	1
27	1
28	4
29	4
30	7
31	7
32	7
33	7
34	7
35	7
36	4
37	4
38	1
39	1
40	1
41	1
42	1
43	1
44	4
45	4
46	7
47	18
48	10
49	10
50	15
51	21
52	21
53	15
54	10
55	10
56	18
57	7
58	4
59	4
60	1
61	1
62	1
63	1
64	1
65	1
66	4
67	4
68	7
69	18
70	23
71	15
72	20
73	37
74	35
75	40
76	46
77	32
78	46
79	40
80	35
81	37
82	20
83	15
84	23
85	18
86	7
87	4
88	4
89	1
90	1
91	1

n	a(n)
0	1
1	1
2	1
3	1
4	1
5	1
6	1
7	1
8	1
9	1
10	4
11	1
12	1
13	1
14	1
15	1
16	1
17	4
18	4
19	2
20	4
21	4
22	1
23	1
24	1
25	1
26	1
27	1
28	4
29	4
30	7
31	7
32	7
33	7
34	7
35	7
36	4
37	4
38	1
39	1
40	1
41	1
42	1
43	1
44	4
45	4
46	7
47	18
48	10
49	10
50	15
51	21
52	21
53	15
54	10
55	10
56	18
57	7
58	4
59	4
60	1
61	1
62	1
63	1
64	1
65	1
66	4
67	4
68	7
69	18
70	23
71	15
72	20
73	37
74	35
75	40
76	46
77	32
78	46
79	40
80	35
81	37
82	20
83	15
84	23
85	18
86	7
87	4
88	4
89	1
90	1
91	1