A076919 - cp's OEIS frontend

A076919 a(1) = 1, a(2) = 2, then a(n+1) is the smallest number such that the highest common factor of a(n) and a(n+1) is different from that of a(n) and a(n-1) and is more than 1.

n	a(n)
1	1
2	2
3	4
4	8
5	10
6	15
7	18
8	20
9	24
10	26
11	39
12	42
13	44
14	48
15	50
16	55
17	66
18	68
19	72
20	74
21	111
22	114
23	116
24	120
25	122
26	183
27	186
28	188
29	192
30	194
31	291
32	294
33	296
34	300
35	302
36	453
37	456
38	458
39	687
40	690
41	692
42	696
43	698
44	1047
45	1050
46	1052
47	1056
48	1058
49	1081
50	1128
51	1130
52	1135
53	1362
54	1364
55	1368
56	1370
57	1375
58	1386
59	1388
60	1392

[1, 2, 4, 8, 10, 15, 18, 20, 24, 26, 39, 42, 44, 48, 50, 55, 66, 68, 72, 74, 111, 114, 116, 120, 122, 183, 186, 188, 192, 194, 291, 294, 296, 300, 302, 453, 456, 458, 687, 690, 692, 696, 698, 1047, 1050, 1052, 1056, 1058, 1081, 1128, 1130, 1135, 1362, 1364, 1368, 1370, 1375, 1386, 1388, 1392]

cp's OEIS Frontend

A076919 a(1) = 1, a(2) = 2, then a(n+1) is the smallest number such that the highest common factor of a(n) and a(n+1) is different from that of a(n) and a(n-1) and is more than 1.

Table of values

List of values