A047836 - cp's OEIS frontend

A047836 "Nullwertzahlen" (or "inverse prime numbers"): n=p1p2p3p4p5...pk, where pi are primes with p1 <= p2 <= p3 <= p4 ...; then p1 = 2 and p1p2...*pi >= p(i+1) for all i < k.

n	a(n)
1	2
2	4
3	8
4	12
5	16
6	24
7	32
8	36
9	40
10	48
11	56
12	60
13	64
14	72
15	80
16	84
17	96
18	108
19	112
20	120
21	128
22	132
23	144
24	160
25	168
26	176
27	180
28	192
29	200
30	208
31	216
32	224
33	240
34	252
35	256
36	264
37	280
38	288
39	300
40	312
41	320
42	324
43	336
44	352
45	360
46	384
47	392
48	396
49	400
50	408
51	416
52	420
53	432
54	440
55	448

[2, 4, 8, 12, 16, 24, 32, 36, 40, 48, 56, 60, 64, 72, 80, 84, 96, 108, 112, 120, 128, 132, 144, 160, 168, 176, 180, 192, 200, 208, 216, 224, 240, 252, 256, 264, 280, 288, 300, 312, 320, 324, 336, 352, 360, 384, 392, 396, 400, 408, 416, 420, 432, 440, 448]

cp's OEIS Frontend

A047836 "Nullwertzahlen" (or "inverse prime numbers"): n=p1p2p3p4p5...pk, where pi are primes with p1 <= p2 <= p3 <= p4 ...; then p1 = 2 and p1p2...*pi >= p(i+1) for all i < k.

Table of values

List of values

n	a(n)
1	2
2	4
3	8
4	12
5	16
6	24
7	32
8	36
9	40
10	48
11	56
12	60
13	64
14	72
15	80
16	84
17	96
18	108
19	112
20	120
21	128
22	132
23	144
24	160
25	168
26	176
27	180
28	192
29	200
30	208
31	216
32	224
33	240
34	252
35	256
36	264
37	280
38	288
39	300
40	312
41	320
42	324
43	336
44	352
45	360
46	384
47	392
48	396
49	400
50	408
51	416
52	420
53	432
54	440
55	448

n	a(n)
1	2
2	4
3	8
4	12
5	16
6	24
7	32
8	36
9	40
10	48
11	56
12	60
13	64
14	72
15	80
16	84
17	96
18	108
19	112
20	120
21	128
22	132
23	144
24	160
25	168
26	176
27	180
28	192
29	200
30	208
31	216
32	224
33	240
34	252
35	256
36	264
37	280
38	288
39	300
40	312
41	320
42	324
43	336
44	352
45	360
46	384
47	392
48	396
49	400
50	408
51	416
52	420
53	432
54	440
55	448

cp's OEIS Frontend

A047836 "Nullwertzahlen" (or "inverse prime numbers"): n=p1*p2*p3*p4*p5*...*pk, where pi are primes with p1 <= p2 <= p3 <= p4 ...; then p1 = 2 and p1*p2*...*pi >= p(i+1) for all i < k.

Table of values

List of values

A047836 "Nullwertzahlen" (or "inverse prime numbers"): n=p1p2p3p4p5...pk, where pi are primes with p1 <= p2 <= p3 <= p4 ...; then p1 = 2 and p1p2...*pi >= p(i+1) for all i < k.

n	a(n)
1	2
2	4
3	8
4	12
5	16
6	24
7	32
8	36
9	40
10	48
11	56
12	60
13	64
14	72
15	80
16	84
17	96
18	108
19	112
20	120
21	128
22	132
23	144
24	160
25	168
26	176
27	180
28	192
29	200
30	208
31	216
32	224
33	240
34	252
35	256
36	264
37	280
38	288
39	300
40	312
41	320
42	324
43	336
44	352
45	360
46	384
47	392
48	396
49	400
50	408
51	416
52	420
53	432
54	440
55	448