A291125 - cp's OEIS frontend

A291125 "Doubly A289484" numbers: numbers with prime factorization p1^e1 * p2^e2 * ... * pk^ek such that there exist i < j < k with p1^e1 * p2^e2 * ... pi^ei > p(i+1) and p1^e1 * p2^e2 * ... pj^ej > p(j+1).

n	a(n)
1	60
2	84
3	120
4	132
5	168
6	180
7	210
8	240
9	252
10	264
11	280
12	300
13	312
14	315
15	330
16	336
17	360
18	390
19	396
20	408
21	420
22	440
23	456
24	468
25	480
26	495
27	504
28	510
29	520
30	528
31	540
32	552
33	560
34	570
35	585
36	588
37	600
38	612
39	616
40	624
41	630
42	660
43	672
44	680
45	684
46	690
47	693
48	720
49	728
50	756
51	760
52	765
53	770
54	780

[60, 84, 120, 132, 168, 180, 210, 240, 252, 264, 280, 300, 312, 315, 330, 336, 360, 390, 396, 408, 420, 440, 456, 468, 480, 495, 504, 510, 520, 528, 540, 552, 560, 570, 585, 588, 600, 612, 616, 624, 630, 660, 672, 680, 684, 690, 693, 720, 728, 756, 760, 765, 770, 780]

cp's OEIS Frontend

A291125 "Doubly A289484" numbers: numbers with prime factorization p1^e1 * p2^e2 * ... * pk^ek such that there exist i < j < k with p1^e1 * p2^e2 * ... pi^ei > p(i+1) and p1^e1 * p2^e2 * ... pj^ej > p(j+1).

Table of values

List of values

n	a(n)
1	60
2	84
3	120
4	132
5	168
6	180
7	210
8	240
9	252
10	264
11	280
12	300
13	312
14	315
15	330
16	336
17	360
18	390
19	396
20	408
21	420
22	440
23	456
24	468
25	480
26	495
27	504
28	510
29	520
30	528
31	540
32	552
33	560
34	570
35	585
36	588
37	600
38	612
39	616
40	624
41	630
42	660
43	672
44	680
45	684
46	690
47	693
48	720
49	728
50	756
51	760
52	765
53	770
54	780

n	a(n)
1	60
2	84
3	120
4	132
5	168
6	180
7	210
8	240
9	252
10	264
11	280
12	300
13	312
14	315
15	330
16	336
17	360
18	390
19	396
20	408
21	420
22	440
23	456
24	468
25	480
26	495
27	504
28	510
29	520
30	528
31	540
32	552
33	560
34	570
35	585
36	588
37	600
38	612
39	616
40	624
41	630
42	660
43	672
44	680
45	684
46	690
47	693
48	720
49	728
50	756
51	760
52	765
53	770
54	780

n	a(n)
1	60
2	84
3	120
4	132
5	168
6	180
7	210
8	240
9	252
10	264
11	280
12	300
13	312
14	315
15	330
16	336
17	360
18	390
19	396
20	408
21	420
22	440
23	456
24	468
25	480
26	495
27	504
28	510
29	520
30	528
31	540
32	552
33	560
34	570
35	585
36	588
37	600
38	612
39	616
40	624
41	630
42	660
43	672
44	680
45	684
46	690
47	693
48	720
49	728
50	756
51	760
52	765
53	770
54	780