A333352 - cp's OEIS frontend

A333352 a(n) is the product of indices of the smallest and greatest prime factors of n.

n	a(n)
1	1
2	1
3	4
4	1
5	9
6	2
7	16
8	1
9	4
10	3
11	25
12	2
13	36
14	4
15	6
16	1
17	49
18	2
19	64
20	3
21	8
22	5
23	81
24	2
25	9
26	6
27	4
28	4
29	100
30	3
31	121
32	1
33	10
34	7
35	12
36	2
37	144
38	8
39	12
40	3
41	169
42	4
43	196
44	5
45	6
46	9
47	225
48	2
49	16
50	3
51	14
52	6
53	256
54	2
55	15
56	4
57	16
58	10
59	289
60	3
61	324
62	11
63	8
64	1
65	18
66	5
67	361
68	7
69	18
70	4
71	400
72	2
73	441
74	12
75	6
76	8
77	20
78	6
79	484
80	3

[1, 1, 4, 1, 9, 2, 16, 1, 4, 3, 25, 2, 36, 4, 6, 1, 49, 2, 64, 3, 8, 5, 81, 2, 9, 6, 4, 4, 100, 3, 121, 1, 10, 7, 12, 2, 144, 8, 12, 3, 169, 4, 196, 5, 6, 9, 225, 2, 16, 3, 14, 6, 256, 2, 15, 4, 16, 10, 289, 3, 324, 11, 8, 1, 18, 5, 361, 7, 18, 4, 400, 2, 441, 12, 6, 8, 20, 6, 484, 3]

cp's OEIS Frontend

A333352 a(n) is the product of indices of the smallest and greatest prime factors of n.

Table of values

List of values

n	a(n)
1	1
2	1
3	4
4	1
5	9
6	2
7	16
8	1
9	4
10	3
11	25
12	2
13	36
14	4
15	6
16	1
17	49
18	2
19	64
20	3
21	8
22	5
23	81
24	2
25	9
26	6
27	4
28	4
29	100
30	3
31	121
32	1
33	10
34	7
35	12
36	2
37	144
38	8
39	12
40	3
41	169
42	4
43	196
44	5
45	6
46	9
47	225
48	2
49	16
50	3
51	14
52	6
53	256
54	2
55	15
56	4
57	16
58	10
59	289
60	3
61	324
62	11
63	8
64	1
65	18
66	5
67	361
68	7
69	18
70	4
71	400
72	2
73	441
74	12
75	6
76	8
77	20
78	6
79	484
80	3

n	a(n)
1	1
2	1
3	4
4	1
5	9
6	2
7	16
8	1
9	4
10	3
11	25
12	2
13	36
14	4
15	6
16	1
17	49
18	2
19	64
20	3
21	8
22	5
23	81
24	2
25	9
26	6
27	4
28	4
29	100
30	3
31	121
32	1
33	10
34	7
35	12
36	2
37	144
38	8
39	12
40	3
41	169
42	4
43	196
44	5
45	6
46	9
47	225
48	2
49	16
50	3
51	14
52	6
53	256
54	2
55	15
56	4
57	16
58	10
59	289
60	3
61	324
62	11
63	8
64	1
65	18
66	5
67	361
68	7
69	18
70	4
71	400
72	2
73	441
74	12
75	6
76	8
77	20
78	6
79	484
80	3

n	a(n)
1	1
2	1
3	4
4	1
5	9
6	2
7	16
8	1
9	4
10	3
11	25
12	2
13	36
14	4
15	6
16	1
17	49
18	2
19	64
20	3
21	8
22	5
23	81
24	2
25	9
26	6
27	4
28	4
29	100
30	3
31	121
32	1
33	10
34	7
35	12
36	2
37	144
38	8
39	12
40	3
41	169
42	4
43	196
44	5
45	6
46	9
47	225
48	2
49	16
50	3
51	14
52	6
53	256
54	2
55	15
56	4
57	16
58	10
59	289
60	3
61	324
62	11
63	8
64	1
65	18
66	5
67	361
68	7
69	18
70	4
71	400
72	2
73	441
74	12
75	6
76	8
77	20
78	6
79	484
80	3