A309944 - cp's OEIS frontend

A309944 Numbers m such that if m = p_1^e_1 * ... * p_k^e_k, where p_1 < ... < p_k are primes, then for all i < k, p_i = A000720(p_{i+1}).

n	a(n)
1	6
2	12
3	15
4	18
5	24
6	30
7	36
8	45
9	48
10	54
11	55
12	60
13	72
14	75
15	90
16	96
17	108
18	119
19	120
20	135
21	144
22	150
23	162
24	165
25	180
26	192
27	216
28	225
29	240
30	270
31	275
32	288
33	300
34	324
35	330
36	341
37	360
38	375
39	384
40	405
41	432
42	450
43	480
44	486
45	495
46	533
47	540
48	576
49	600
50	605
51	648
52	660
53	675
54	720
55	750
56	768

[6, 12, 15, 18, 24, 30, 36, 45, 48, 54, 55, 60, 72, 75, 90, 96, 108, 119, 120, 135, 144, 150, 162, 165, 180, 192, 216, 225, 240, 270, 275, 288, 300, 324, 330, 341, 360, 375, 384, 405, 432, 450, 480, 486, 495, 533, 540, 576, 600, 605, 648, 660, 675, 720, 750, 768]

cp's OEIS Frontend

A309944 Numbers m such that if m = p_1^e_1 * ... * p_k^e_k, where p_1 < ... < p_k are primes, then for all i < k, p_i = A000720(p_{i+1}).

Table of values

List of values

n	a(n)
1	6
2	12
3	15
4	18
5	24
6	30
7	36
8	45
9	48
10	54
11	55
12	60
13	72
14	75
15	90
16	96
17	108
18	119
19	120
20	135
21	144
22	150
23	162
24	165
25	180
26	192
27	216
28	225
29	240
30	270
31	275
32	288
33	300
34	324
35	330
36	341
37	360
38	375
39	384
40	405
41	432
42	450
43	480
44	486
45	495
46	533
47	540
48	576
49	600
50	605
51	648
52	660
53	675
54	720
55	750
56	768

n	a(n)
1	6
2	12
3	15
4	18
5	24
6	30
7	36
8	45
9	48
10	54
11	55
12	60
13	72
14	75
15	90
16	96
17	108
18	119
19	120
20	135
21	144
22	150
23	162
24	165
25	180
26	192
27	216
28	225
29	240
30	270
31	275
32	288
33	300
34	324
35	330
36	341
37	360
38	375
39	384
40	405
41	432
42	450
43	480
44	486
45	495
46	533
47	540
48	576
49	600
50	605
51	648
52	660
53	675
54	720
55	750
56	768

n	a(n)
1	6
2	12
3	15
4	18
5	24
6	30
7	36
8	45
9	48
10	54
11	55
12	60
13	72
14	75
15	90
16	96
17	108
18	119
19	120
20	135
21	144
22	150
23	162
24	165
25	180
26	192
27	216
28	225
29	240
30	270
31	275
32	288
33	300
34	324
35	330
36	341
37	360
38	375
39	384
40	405
41	432
42	450
43	480
44	486
45	495
46	533
47	540
48	576
49	600
50	605
51	648
52	660
53	675
54	720
55	750
56	768