A128333 - cp's OEIS frontend

A128333 a(0) = 0; for n > 0, a(n) = a(n-1)/2 if that number is an integer and not already in the sequence, otherwise a(n) = 3*a(n-1) + 1.

n	a(n)
0	0
1	1
2	4
3	2
4	7
5	22
6	11
7	34
8	17
9	52
10	26
11	13
12	40
13	20
14	10
15	5
16	16
17	8
18	25
19	76
20	38
21	19
22	58
23	29
24	88
25	44
26	133
27	400
28	200
29	100
30	50
31	151
32	454
33	227
34	682
35	341
36	1024
37	512
38	256
39	128
40	64
41	32
42	97
43	292
44	146
45	73
46	220
47	110
48	55
49	166
50	83
51	250
52	125
53	376
54	188
55	94
56	47
57	142
58	71
59	214
60	107
61	322
62	161

[0, 1, 4, 2, 7, 22, 11, 34, 17, 52, 26, 13, 40, 20, 10, 5, 16, 8, 25, 76, 38, 19, 58, 29, 88, 44, 133, 400, 200, 100, 50, 151, 454, 227, 682, 341, 1024, 512, 256, 128, 64, 32, 97, 292, 146, 73, 220, 110, 55, 166, 83, 250, 125, 376, 188, 94, 47, 142, 71, 214, 107, 322, 161]

cp's OEIS Frontend

A128333 a(0) = 0; for n > 0, a(n) = a(n-1)/2 if that number is an integer and not already in the sequence, otherwise a(n) = 3*a(n-1) + 1.

Table of values

List of values