A321454 - cp's OEIS frontend

A321454 Numbers that can be factored into two or more factors all having the same sum of prime indices.

n	a(n)
1	4
2	8
3	9
4	12
5	16
6	25
7	27
8	30
9	32
10	36
11	40
12	48
13	49
14	63
15	64
16	70
17	81
18	84
19	90
20	100
21	108
22	112
23	120
24	121
25	125
26	128
27	144
28	150
29	154
30	160
31	165
32	169
33	180
34	192
35	196
36	198
37	200
38	210
39	216
40	220
41	225
42	240
43	243
44	252
45	256
46	264
47	270
48	273
49	280
50	286
51	288
52	289
53	300
54	320
55	324
56	325

[4, 8, 9, 12, 16, 25, 27, 30, 32, 36, 40, 48, 49, 63, 64, 70, 81, 84, 90, 100, 108, 112, 120, 121, 125, 128, 144, 150, 154, 160, 165, 169, 180, 192, 196, 198, 200, 210, 216, 220, 225, 240, 243, 252, 256, 264, 270, 273, 280, 286, 288, 289, 300, 320, 324, 325]

cp's OEIS Frontend

A321454 Numbers that can be factored into two or more factors all having the same sum of prime indices.

Table of values

List of values

n	a(n)
1	4
2	8
3	9
4	12
5	16
6	25
7	27
8	30
9	32
10	36
11	40
12	48
13	49
14	63
15	64
16	70
17	81
18	84
19	90
20	100
21	108
22	112
23	120
24	121
25	125
26	128
27	144
28	150
29	154
30	160
31	165
32	169
33	180
34	192
35	196
36	198
37	200
38	210
39	216
40	220
41	225
42	240
43	243
44	252
45	256
46	264
47	270
48	273
49	280
50	286
51	288
52	289
53	300
54	320
55	324
56	325

n	a(n)
1	4
2	8
3	9
4	12
5	16
6	25
7	27
8	30
9	32
10	36
11	40
12	48
13	49
14	63
15	64
16	70
17	81
18	84
19	90
20	100
21	108
22	112
23	120
24	121
25	125
26	128
27	144
28	150
29	154
30	160
31	165
32	169
33	180
34	192
35	196
36	198
37	200
38	210
39	216
40	220
41	225
42	240
43	243
44	252
45	256
46	264
47	270
48	273
49	280
50	286
51	288
52	289
53	300
54	320
55	324
56	325

n	a(n)
1	4
2	8
3	9
4	12
5	16
6	25
7	27
8	30
9	32
10	36
11	40
12	48
13	49
14	63
15	64
16	70
17	81
18	84
19	90
20	100
21	108
22	112
23	120
24	121
25	125
26	128
27	144
28	150
29	154
30	160
31	165
32	169
33	180
34	192
35	196
36	198
37	200
38	210
39	216
40	220
41	225
42	240
43	243
44	252
45	256
46	264
47	270
48	273
49	280
50	286
51	288
52	289
53	300
54	320
55	324
56	325