A292766 - cp's OEIS frontend

A292766 Numbers n whose trajectory under iteration of the map k -> (sigma(k)+phi(k))/2 consists only of integers and is unbounded, excluding numbers n whose trajectory merges with the trajectory of a smaller number.

n	a(n)
1	270
2	440
3	496
4	702
5	737
6	813
7	828
8	897
9	905
10	1027
11	1066
12	1099
13	1240
14	1241
15	1260
16	1331
17	1353
18	1368
19	1371
20	1422
21	1507
22	1537
23	1754
24	1760
25	1834
26	1848
27	2002
28	2016
29	2282

[270, 440, 496, 702, 737, 813, 828, 897, 905, 1027, 1066, 1099, 1240, 1241, 1260, 1331, 1353, 1368, 1371, 1422, 1507, 1537, 1754, 1760, 1834, 1848, 2002, 2016, 2282]

cp's OEIS Frontend

A292766 Numbers n whose trajectory under iteration of the map k -> (sigma(k)+phi(k))/2 consists only of integers and is unbounded, excluding numbers n whose trajectory merges with the trajectory of a smaller number.

Table of values

List of values