A386992 - cp's OEIS frontend

A386992 Irregular triangle read by rows: T(n,k) is the number of nonprimes in the k-th 2-dense sublist of divisors of n, with n >= 1, k >= 1.

n	a(n)
1	1
2	1
3	1
4	0
5	2
6	1
7	0
8	2
9	1
10	0
11	3
12	1
13	0
14	1
15	1
16	1
17	1
18	0
19	4
20	1
21	0
22	1
23	1
24	1
25	0
26	1
27	4
28	1
29	0
30	4
31	1
32	0
33	4
34	1
35	0
36	0
37	1
38	1
39	1
40	1
41	0
42	6
43	1
44	0
45	1
46	1
47	1
48	1
49	0
50	1
51	1
52	4
53	1
54	0
55	5
56	1
57	0
58	5
59	1
60	0
61	0
62	1
63	1
64	1
65	1
66	0
67	1
68	7
69	1
70	0
71	1
72	1
73	1
74	0
75	0
76	1
77	6
78	1
79	0
80	5
81	1
82	0
83	2
84	2
85	1
86	2
87	1
88	1
89	1
90	1
91	0
92	8
93	1
94	0
95	1
96	1
97	1
98	2
99	1
100	0
101	0
102	1
103	2
104	2
105	1
106	0

[1, 1, 1, 0, 2, 1, 0, 2, 1, 0, 3, 1, 0, 1, 1, 1, 1, 0, 4, 1, 0, 1, 1, 1, 0, 1, 4, 1, 0, 4, 1, 0, 4, 1, 0, 0, 1, 1, 1, 1, 0, 6, 1, 0, 1, 1, 1, 1, 0, 1, 1, 4, 1, 0, 5, 1, 0, 5, 1, 0, 0, 1, 1, 1, 1, 0, 1, 7, 1, 0, 1, 1, 1, 0, 0, 1, 6, 1, 0, 5, 1, 0, 2, 2, 1, 2, 1, 1, 1, 1, 0, 8, 1, 0, 1, 1, 1, 2, 1, 0, 0, 1, 2, 2, 1, 0]

cp's OEIS Frontend

A386992 Irregular triangle read by rows: T(n,k) is the number of nonprimes in the k-th 2-dense sublist of divisors of n, with n >= 1, k >= 1.

Table of values

List of values

n	a(n)
1	1
2	1
3	1
4	0
5	2
6	1
7	0
8	2
9	1
10	0
11	3
12	1
13	0
14	1
15	1
16	1
17	1
18	0
19	4
20	1
21	0
22	1
23	1
24	1
25	0
26	1
27	4
28	1
29	0
30	4
31	1
32	0
33	4
34	1
35	0
36	0
37	1
38	1
39	1
40	1
41	0
42	6
43	1
44	0
45	1
46	1
47	1
48	1
49	0
50	1
51	1
52	4
53	1
54	0
55	5
56	1
57	0
58	5
59	1
60	0
61	0
62	1
63	1
64	1
65	1
66	0
67	1
68	7
69	1
70	0
71	1
72	1
73	1
74	0
75	0
76	1
77	6
78	1
79	0
80	5
81	1
82	0
83	2
84	2
85	1
86	2
87	1
88	1
89	1
90	1
91	0
92	8
93	1
94	0
95	1
96	1
97	1
98	2
99	1
100	0
101	0
102	1
103	2
104	2
105	1
106	0

n	a(n)
1	1
2	1
3	1
4	0
5	2
6	1
7	0
8	2
9	1
10	0
11	3
12	1
13	0
14	1
15	1
16	1
17	1
18	0
19	4
20	1
21	0
22	1
23	1
24	1
25	0
26	1
27	4
28	1
29	0
30	4
31	1
32	0
33	4
34	1
35	0
36	0
37	1
38	1
39	1
40	1
41	0
42	6
43	1
44	0
45	1
46	1
47	1
48	1
49	0
50	1
51	1
52	4
53	1
54	0
55	5
56	1
57	0
58	5
59	1
60	0
61	0
62	1
63	1
64	1
65	1
66	0
67	1
68	7
69	1
70	0
71	1
72	1
73	1
74	0
75	0
76	1
77	6
78	1
79	0
80	5
81	1
82	0
83	2
84	2
85	1
86	2
87	1
88	1
89	1
90	1
91	0
92	8
93	1
94	0
95	1
96	1
97	1
98	2
99	1
100	0
101	0
102	1
103	2
104	2
105	1
106	0

n	a(n)
1	1
2	1
3	1
4	0
5	2
6	1
7	0
8	2
9	1
10	0
11	3
12	1
13	0
14	1
15	1
16	1
17	1
18	0
19	4
20	1
21	0
22	1
23	1
24	1
25	0
26	1
27	4
28	1
29	0
30	4
31	1
32	0
33	4
34	1
35	0
36	0
37	1
38	1
39	1
40	1
41	0
42	6
43	1
44	0
45	1
46	1
47	1
48	1
49	0
50	1
51	1
52	4
53	1
54	0
55	5
56	1
57	0
58	5
59	1
60	0
61	0
62	1
63	1
64	1
65	1
66	0
67	1
68	7
69	1
70	0
71	1
72	1
73	1
74	0
75	0
76	1
77	6
78	1
79	0
80	5
81	1
82	0
83	2
84	2
85	1
86	2
87	1
88	1
89	1
90	1
91	0
92	8
93	1
94	0
95	1
96	1
97	1
98	2
99	1
100	0
101	0
102	1
103	2
104	2
105	1
106	0