A233341 - cp's OEIS frontend

A233341 Least number m for which n applications of the mapping r(k) = k - (greatest prime divisor of k) map m to 0.

n	a(n)
1	1
2	4
3	8
4	12
5	25
6	30
7	32
8	48
9	63
10	70
11	75
12	80
13	165
14	176
15	189
16	192
17	289
18	306
19	315
20	320
21	385
22	392
23	507
24	520
25	575
26	598
27	621
28	644
29	841
30	858
31	957
32	968
33	1015
34	1044
35	1071
36	1088
37	1105
38	1122
39	1425
40	1444
41	1463
42	1470
43	1771
44	1782
45	1935
46	1978
47	2145
48	2156
49	2303
50	2350
51	2397

[1, 4, 8, 12, 25, 30, 32, 48, 63, 70, 75, 80, 165, 176, 189, 192, 289, 306, 315, 320, 385, 392, 507, 520, 575, 598, 621, 644, 841, 858, 957, 968, 1015, 1044, 1071, 1088, 1105, 1122, 1425, 1444, 1463, 1470, 1771, 1782, 1935, 1978, 2145, 2156, 2303, 2350, 2397]

cp's OEIS Frontend

A233341 Least number m for which n applications of the mapping r(k) = k - (greatest prime divisor of k) map m to 0.

Table of values

List of values