A050020 - cp's OEIS frontend

A050020 a(n) = floor(a(n-1)/2) if this is positive and not yet in the sequence, otherwise a(n) = 10*a(n-1).

n	a(n)
1	1
2	10
3	5
4	2
5	20
6	200
7	100
8	50
9	25
10	12
11	6
12	3
13	30
14	15
15	7
16	70
17	35
18	17
19	8
20	4
21	40
22	400
23	4000
24	2000
25	1000
26	500
27	250
28	125
29	62
30	31
31	310
32	155
33	77
34	38
35	19
36	9
37	90
38	45
39	22
40	11
41	110
42	55
43	27
44	13
45	130
46	65
47	32
48	16
49	160
50	80
51	800
52	8000
53	80000
54	40000
55	20000

[1, 10, 5, 2, 20, 200, 100, 50, 25, 12, 6, 3, 30, 15, 7, 70, 35, 17, 8, 4, 40, 400, 4000, 2000, 1000, 500, 250, 125, 62, 31, 310, 155, 77, 38, 19, 9, 90, 45, 22, 11, 110, 55, 27, 13, 130, 65, 32, 16, 160, 80, 800, 8000, 80000, 40000, 20000]

cp's OEIS Frontend

A050020 a(n) = floor(a(n-1)/2) if this is positive and not yet in the sequence, otherwise a(n) = 10*a(n-1).

Table of values

List of values