A304254 - cp's OEIS frontend

A304254 Irregular triangle read by rows: row n lists divisors of n^2 in decreasing order.

n	a(n)
1	1
2	4
3	2
4	1
5	9
6	3
7	1
8	16
9	8
10	4
11	2
12	1
13	25
14	5
15	1
16	36
17	18
18	12
19	9
20	6
21	4
22	3
23	2
24	1
25	49
26	7
27	1
28	64
29	32
30	16
31	8
32	4
33	2
34	1
35	81
36	27
37	9
38	3
39	1
40	100
41	50
42	25
43	20
44	10
45	5
46	4
47	2
48	1
49	121
50	11
51	1
52	144
53	72
54	48
55	36
56	24
57	18
58	16
59	12
60	9
61	8
62	6
63	4
64	3
65	2
66	1
67	169
68	13
69	1
70	196
71	98
72	49
73	28
74	14
75	7
76	4
77	2
78	1

[1, 4, 2, 1, 9, 3, 1, 16, 8, 4, 2, 1, 25, 5, 1, 36, 18, 12, 9, 6, 4, 3, 2, 1, 49, 7, 1, 64, 32, 16, 8, 4, 2, 1, 81, 27, 9, 3, 1, 100, 50, 25, 20, 10, 5, 4, 2, 1, 121, 11, 1, 144, 72, 48, 36, 24, 18, 16, 12, 9, 8, 6, 4, 3, 2, 1, 169, 13, 1, 196, 98, 49, 28, 14, 7, 4, 2, 1]

cp's OEIS Frontend

A304254 Irregular triangle read by rows: row n lists divisors of n^2 in decreasing order.

Table of values

List of values

n	a(n)
1	1
2	4
3	2
4	1
5	9
6	3
7	1
8	16
9	8
10	4
11	2
12	1
13	25
14	5
15	1
16	36
17	18
18	12
19	9
20	6
21	4
22	3
23	2
24	1
25	49
26	7
27	1
28	64
29	32
30	16
31	8
32	4
33	2
34	1
35	81
36	27
37	9
38	3
39	1
40	100
41	50
42	25
43	20
44	10
45	5
46	4
47	2
48	1
49	121
50	11
51	1
52	144
53	72
54	48
55	36
56	24
57	18
58	16
59	12
60	9
61	8
62	6
63	4
64	3
65	2
66	1
67	169
68	13
69	1
70	196
71	98
72	49
73	28
74	14
75	7
76	4
77	2
78	1

n	a(n)
1	1
2	4
3	2
4	1
5	9
6	3
7	1
8	16
9	8
10	4
11	2
12	1
13	25
14	5
15	1
16	36
17	18
18	12
19	9
20	6
21	4
22	3
23	2
24	1
25	49
26	7
27	1
28	64
29	32
30	16
31	8
32	4
33	2
34	1
35	81
36	27
37	9
38	3
39	1
40	100
41	50
42	25
43	20
44	10
45	5
46	4
47	2
48	1
49	121
50	11
51	1
52	144
53	72
54	48
55	36
56	24
57	18
58	16
59	12
60	9
61	8
62	6
63	4
64	3
65	2
66	1
67	169
68	13
69	1
70	196
71	98
72	49
73	28
74	14
75	7
76	4
77	2
78	1

n	a(n)
1	1
2	4
3	2
4	1
5	9
6	3
7	1
8	16
9	8
10	4
11	2
12	1
13	25
14	5
15	1
16	36
17	18
18	12
19	9
20	6
21	4
22	3
23	2
24	1
25	49
26	7
27	1
28	64
29	32
30	16
31	8
32	4
33	2
34	1
35	81
36	27
37	9
38	3
39	1
40	100
41	50
42	25
43	20
44	10
45	5
46	4
47	2
48	1
49	121
50	11
51	1
52	144
53	72
54	48
55	36
56	24
57	18
58	16
59	12
60	9
61	8
62	6
63	4
64	3
65	2
66	1
67	169
68	13
69	1
70	196
71	98
72	49
73	28
74	14
75	7
76	4
77	2
78	1