A299481 - cp's OEIS frontend

A299481 Irregular triangle read by rows in which row n lists the odd divisors of n in decreasing order together with the even divisors of n in increasing order.

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

[1, 1, 2, 3, 1, 1, 2, 4, 5, 1, 3, 1, 2, 6, 7, 1, 1, 2, 4, 8, 9, 3, 1, 5, 1, 2, 10, 11, 1, 3, 1, 2, 4, 6, 12, 13, 1, 7, 1, 2, 14, 15, 5, 3, 1, 1, 2, 4, 8, 16, 17, 1, 9, 3, 1, 2, 6, 18, 19, 1, 5, 1, 2, 4, 10, 20, 21, 7, 3, 1, 11, 1, 2, 22, 23, 1, 3, 1, 2, 4, 6, 8, 12, 24, 25, 5, 1, 13, 1, 2, 26, 27, 9, 3, 1]

cp's OEIS Frontend

A299481 Irregular triangle read by rows in which row n lists the odd divisors of n in decreasing order together with the even divisors of n in increasing order.

Table of values

List of values

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

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

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