A340419 - cp's OEIS frontend

A340419 Trajectory of 397 under the map A340008: n -> n/2 if n is even, n-> n^2 - 1 if n is an odd prime, otherwise n -> n - 1.

n	a(n)
0	397
1	157608
2	78804
3	39402
4	19701
5	19700
6	9850
7	4925
8	4924
9	2462
10	1231
11	1515360
12	757680
13	378840
14	189420
15	94710
16	47355
17	47354
18	23677
19	560600328
20	280300164
21	140150082
22	70075041
23	70075040
24	35037520
25	17518760
26	8759380
27	4379690
28	2189845
29	2189844
30	1094922
31	547461

[397, 157608, 78804, 39402, 19701, 19700, 9850, 4925, 4924, 2462, 1231, 1515360, 757680, 378840, 189420, 94710, 47355, 47354, 23677, 560600328, 280300164, 140150082, 70075041, 70075040, 35037520, 17518760, 8759380, 4379690, 2189845, 2189844, 1094922, 547461]

cp's OEIS Frontend

A340419 Trajectory of 397 under the map A340008: n -> n/2 if n is even, n-> n^2 - 1 if n is an odd prime, otherwise n -> n - 1.

Table of values

List of values