A379288 - cp's OEIS frontend

A379288 Irregular triangle read by rows in which row n lists the odd divisors of n excluding odd divisors e for which there exists another divisor j with j < e < 2*j.

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

[1, 1, 1, 3, 1, 1, 5, 1, 1, 7, 1, 1, 3, 9, 1, 5, 1, 11, 1, 1, 13, 1, 7, 1, 3, 15, 1, 1, 17, 1, 1, 19, 1, 1, 3, 7, 21, 1, 11, 1, 23, 1, 1, 5, 25, 1, 13, 1, 3, 9, 27, 1, 1, 29, 1, 1, 31, 1, 1, 3, 11, 33, 1, 17, 1, 5, 35, 1, 1, 37, 1, 19, 1, 3, 13, 39, 1, 1, 41, 1, 1, 43]

cp's OEIS Frontend

A379288 Irregular triangle read by rows in which row n lists the odd divisors of n excluding odd divisors e for which there exists another divisor j with j < e < 2*j.

Table of values

List of values

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

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

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