A181820 - cp's OEIS frontend

A181820 a(1) = 1; for n > 1, if A025487(n) = Product p(i)^e(i), then a(n) = Product p(e(i)).

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	10
9	8
10	11
11	9
12	14
13	12
14	13
15	15
16	22
17	20
18	17
19	21
20	18
21	26
22	16
23	25
24	28
25	19
26	33
27	30
28	34
29	24
30	35
31	44
32	23
33	39
34	42
35	38
36	40
37	55
38	27
39	52
40	29
41	50
42	51
43	36
44	49
45	66
46	46
47	56
48	65
49	45
50	68
51	31
52	70
53	57
54	32
55	60
56	77
57	78
58	58
59	88
60	85
61	63
62	76
63	37
64	110
65	69
66	48
67	84
68	91
69	75
70	102
71	62
72	54
73	98
74	104
75	95

[1, 2, 3, 4, 5, 6, 7, 10, 8, 11, 9, 14, 12, 13, 15, 22, 20, 17, 21, 18, 26, 16, 25, 28, 19, 33, 30, 34, 24, 35, 44, 23, 39, 42, 38, 40, 55, 27, 52, 29, 50, 51, 36, 49, 66, 46, 56, 65, 45, 68, 31, 70, 57, 32, 60, 77, 78, 58, 88, 85, 63, 76, 37, 110, 69, 48, 84, 91, 75, 102, 62, 54, 98, 104, 95]

cp's OEIS Frontend

A181820 a(1) = 1; for n > 1, if A025487(n) = Product p(i)^e(i), then a(n) = Product p(e(i)).

Table of values

List of values

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	10
9	8
10	11
11	9
12	14
13	12
14	13
15	15
16	22
17	20
18	17
19	21
20	18
21	26
22	16
23	25
24	28
25	19
26	33
27	30
28	34
29	24
30	35
31	44
32	23
33	39
34	42
35	38
36	40
37	55
38	27
39	52
40	29
41	50
42	51
43	36
44	49
45	66
46	46
47	56
48	65
49	45
50	68
51	31
52	70
53	57
54	32
55	60
56	77
57	78
58	58
59	88
60	85
61	63
62	76
63	37
64	110
65	69
66	48
67	84
68	91
69	75
70	102
71	62
72	54
73	98
74	104
75	95

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	10
9	8
10	11
11	9
12	14
13	12
14	13
15	15
16	22
17	20
18	17
19	21
20	18
21	26
22	16
23	25
24	28
25	19
26	33
27	30
28	34
29	24
30	35
31	44
32	23
33	39
34	42
35	38
36	40
37	55
38	27
39	52
40	29
41	50
42	51
43	36
44	49
45	66
46	46
47	56
48	65
49	45
50	68
51	31
52	70
53	57
54	32
55	60
56	77
57	78
58	58
59	88
60	85
61	63
62	76
63	37
64	110
65	69
66	48
67	84
68	91
69	75
70	102
71	62
72	54
73	98
74	104
75	95

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	10
9	8
10	11
11	9
12	14
13	12
14	13
15	15
16	22
17	20
18	17
19	21
20	18
21	26
22	16
23	25
24	28
25	19
26	33
27	30
28	34
29	24
30	35
31	44
32	23
33	39
34	42
35	38
36	40
37	55
38	27
39	52
40	29
41	50
42	51
43	36
44	49
45	66
46	46
47	56
48	65
49	45
50	68
51	31
52	70
53	57
54	32
55	60
56	77
57	78
58	58
59	88
60	85
61	63
62	76
63	37
64	110
65	69
66	48
67	84
68	91
69	75
70	102
71	62
72	54
73	98
74	104
75	95