A050000 - cp's OEIS frontend

A050000 a(n) = floor(a(n-1)/2) if this is not among 0, a(1), ..., a(n-2); otherwise a(n) = 3*a(n-1).

n	a(n)
1	1
2	3
3	9
4	4
5	2
6	6
7	18
8	54
9	27
10	13
11	39
12	19
13	57
14	28
15	14
16	7
17	21
18	10
19	5
20	15
21	45
22	22
23	11
24	33
25	16
26	8
27	24
28	12
29	36
30	108
31	324
32	162
33	81
34	40
35	20
36	60
37	30
38	90
39	270
40	135
41	67
42	201
43	100
44	50
45	25
46	75
47	37
48	111
49	55
50	165
51	82
52	41
53	123
54	61
55	183
56	91
57	273
58	136
59	68

[1, 3, 9, 4, 2, 6, 18, 54, 27, 13, 39, 19, 57, 28, 14, 7, 21, 10, 5, 15, 45, 22, 11, 33, 16, 8, 24, 12, 36, 108, 324, 162, 81, 40, 20, 60, 30, 90, 270, 135, 67, 201, 100, 50, 25, 75, 37, 111, 55, 165, 82, 41, 123, 61, 183, 91, 273, 136, 68]

cp's OEIS Frontend

A050000 a(n) = floor(a(n-1)/2) if this is not among 0, a(1), ..., a(n-2); otherwise a(n) = 3*a(n-1).

Table of values

List of values

n	a(n)
1	1
2	3
3	9
4	4
5	2
6	6
7	18
8	54
9	27
10	13
11	39
12	19
13	57
14	28
15	14
16	7
17	21
18	10
19	5
20	15
21	45
22	22
23	11
24	33
25	16
26	8
27	24
28	12
29	36
30	108
31	324
32	162
33	81
34	40
35	20
36	60
37	30
38	90
39	270
40	135
41	67
42	201
43	100
44	50
45	25
46	75
47	37
48	111
49	55
50	165
51	82
52	41
53	123
54	61
55	183
56	91
57	273
58	136
59	68

n	a(n)
1	1
2	3
3	9
4	4
5	2
6	6
7	18
8	54
9	27
10	13
11	39
12	19
13	57
14	28
15	14
16	7
17	21
18	10
19	5
20	15
21	45
22	22
23	11
24	33
25	16
26	8
27	24
28	12
29	36
30	108
31	324
32	162
33	81
34	40
35	20
36	60
37	30
38	90
39	270
40	135
41	67
42	201
43	100
44	50
45	25
46	75
47	37
48	111
49	55
50	165
51	82
52	41
53	123
54	61
55	183
56	91
57	273
58	136
59	68

n	a(n)
1	1
2	3
3	9
4	4
5	2
6	6
7	18
8	54
9	27
10	13
11	39
12	19
13	57
14	28
15	14
16	7
17	21
18	10
19	5
20	15
21	45
22	22
23	11
24	33
25	16
26	8
27	24
28	12
29	36
30	108
31	324
32	162
33	81
34	40
35	20
36	60
37	30
38	90
39	270
40	135
41	67
42	201
43	100
44	50
45	25
46	75
47	37
48	111
49	55
50	165
51	82
52	41
53	123
54	61
55	183
56	91
57	273
58	136
59	68