A264664 - cp's OEIS frontend

A264664 a(1)=210; for n > 1, a(n) is the least integer not occurring earlier such that a(n) shares exactly four distinct prime divisors with a(n-1).

n	a(n)
1	210
2	420
3	630
4	840
5	1050
6	1260
7	1470
8	1680
9	1890
10	2100
11	2310
12	330
13	660
14	990
15	1320
16	1650
17	1980
18	2640
19	2970
20	3300
21	3630
22	3960
23	4290
24	390
25	780
26	1170
27	1560
28	1950
29	2340
30	2730
31	546
32	1092
33	1638
34	2184
35	3276
36	3822
37	4368
38	4914
39	5460
40	910
41	1820
42	3640
43	4550
44	6370
45	7280

[210, 420, 630, 840, 1050, 1260, 1470, 1680, 1890, 2100, 2310, 330, 660, 990, 1320, 1650, 1980, 2640, 2970, 3300, 3630, 3960, 4290, 390, 780, 1170, 1560, 1950, 2340, 2730, 546, 1092, 1638, 2184, 3276, 3822, 4368, 4914, 5460, 910, 1820, 3640, 4550, 6370, 7280]

cp's OEIS Frontend

A264664 a(1)=210; for n > 1, a(n) is the least integer not occurring earlier such that a(n) shares exactly four distinct prime divisors with a(n-1).

Table of values

List of values