A340008 - cp's OEIS frontend

A340008 a(n) is the image of n under the map: n -> n/2 if n is even, n-> n^2 - 1 if n is an odd prime, otherwise n -> n - 1.

n	a(n)
1	0
2	1
3	8
4	2
5	24
6	3
7	48
8	4
9	8
10	5
11	120
12	6
13	168
14	7
15	14
16	8
17	288
18	9
19	360
20	10
21	20
22	11
23	528
24	12
25	24
26	13
27	26
28	14
29	840
30	15
31	960
32	16
33	32
34	17
35	34
36	18
37	1368
38	19
39	38
40	20
41	1680
42	21
43	1848
44	22
45	44
46	23
47	2208
48	24
49	48
50	25
51	50
52	26
53	2808
54	27
55	54
56	28
57	56
58	29
59	3480
60	30
61	3720
62	31
63	62
64	32

[0, 1, 8, 2, 24, 3, 48, 4, 8, 5, 120, 6, 168, 7, 14, 8, 288, 9, 360, 10, 20, 11, 528, 12, 24, 13, 26, 14, 840, 15, 960, 16, 32, 17, 34, 18, 1368, 19, 38, 20, 1680, 21, 1848, 22, 44, 23, 2208, 24, 48, 25, 50, 26, 2808, 27, 54, 28, 56, 29, 3480, 30, 3720, 31, 62, 32]

cp's OEIS Frontend

A340008 a(n) is the image of n under the map: 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