A375037 - cp's OEIS frontend

A375037 Irregular triangle read by rows T(n,k), n >= 1, k >= 1, in which row n lists the divisors of n but every middle divisor is replaced with zero.

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

[0, 0, 2, 1, 3, 1, 0, 4, 1, 5, 1, 0, 0, 6, 1, 7, 1, 0, 4, 8, 1, 0, 9, 1, 2, 5, 10, 1, 11, 1, 2, 0, 0, 6, 12, 1, 13, 1, 2, 7, 14, 1, 0, 0, 15, 1, 2, 0, 8, 16, 1, 17, 1, 2, 0, 6, 9, 18, 1, 19, 1, 2, 0, 0, 10, 20, 1, 3, 7, 21, 1, 2, 11, 22, 1, 23, 1, 2, 3, 0, 0, 8, 12, 24]

cp's OEIS Frontend

A375037 Irregular triangle read by rows T(n,k), n >= 1, k >= 1, in which row n lists the divisors of n but every middle divisor is replaced with zero.

Table of values

List of values

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

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

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