A382822 - cp's OEIS frontend

A382822 If a(n-1) is odd, then a(n) is the smallest even integer not yet in the sequence; if a(n-1) is even, then a(n) = a(n-1)/2 if this number is not in the sequence, otherwise a(n) = 3*a(n-1)/2; a(1)=1.

n	a(n)
1	1
2	2
3	3
4	4
5	6
6	9
7	8
8	12
9	18
10	27
11	10
12	5
13	14
14	7
15	16
16	24
17	36
18	54
19	81
20	20
21	30
22	15
23	22
24	11
25	26
26	13
27	28
28	42
29	21
30	32
31	48
32	72
33	108
34	162
35	243
36	34
37	17
38	38
39	19
40	40
41	60
42	90
43	45
44	44
45	66
46	33
47	46
48	23
49	50
50	25
51	52
52	78
53	39
54	56
55	84
56	126
57	63
58	58
59	29
60	62
61	31
62	64
63	96
64	144
65	216
66	324
67	486
68	729
69	68
70	102
71	51
72	70
73	35
74	74
75	37
76	76
77	114
78	57

[1, 2, 3, 4, 6, 9, 8, 12, 18, 27, 10, 5, 14, 7, 16, 24, 36, 54, 81, 20, 30, 15, 22, 11, 26, 13, 28, 42, 21, 32, 48, 72, 108, 162, 243, 34, 17, 38, 19, 40, 60, 90, 45, 44, 66, 33, 46, 23, 50, 25, 52, 78, 39, 56, 84, 126, 63, 58, 29, 62, 31, 64, 96, 144, 216, 324, 486, 729, 68, 102, 51, 70, 35, 74, 37, 76, 114, 57]

cp's OEIS Frontend

A382822 If a(n-1) is odd, then a(n) is the smallest even integer not yet in the sequence; if a(n-1) is even, then a(n) = a(n-1)/2 if this number is not in the sequence, otherwise a(n) = 3*a(n-1)/2; a(1)=1.

Table of values

List of values

n	a(n)
1	1
2	2
3	3
4	4
5	6
6	9
7	8
8	12
9	18
10	27
11	10
12	5
13	14
14	7
15	16
16	24
17	36
18	54
19	81
20	20
21	30
22	15
23	22
24	11
25	26
26	13
27	28
28	42
29	21
30	32
31	48
32	72
33	108
34	162
35	243
36	34
37	17
38	38
39	19
40	40
41	60
42	90
43	45
44	44
45	66
46	33
47	46
48	23
49	50
50	25
51	52
52	78
53	39
54	56
55	84
56	126
57	63
58	58
59	29
60	62
61	31
62	64
63	96
64	144
65	216
66	324
67	486
68	729
69	68
70	102
71	51
72	70
73	35
74	74
75	37
76	76
77	114
78	57

n	a(n)
1	1
2	2
3	3
4	4
5	6
6	9
7	8
8	12
9	18
10	27
11	10
12	5
13	14
14	7
15	16
16	24
17	36
18	54
19	81
20	20
21	30
22	15
23	22
24	11
25	26
26	13
27	28
28	42
29	21
30	32
31	48
32	72
33	108
34	162
35	243
36	34
37	17
38	38
39	19
40	40
41	60
42	90
43	45
44	44
45	66
46	33
47	46
48	23
49	50
50	25
51	52
52	78
53	39
54	56
55	84
56	126
57	63
58	58
59	29
60	62
61	31
62	64
63	96
64	144
65	216
66	324
67	486
68	729
69	68
70	102
71	51
72	70
73	35
74	74
75	37
76	76
77	114
78	57

n	a(n)
1	1
2	2
3	3
4	4
5	6
6	9
7	8
8	12
9	18
10	27
11	10
12	5
13	14
14	7
15	16
16	24
17	36
18	54
19	81
20	20
21	30
22	15
23	22
24	11
25	26
26	13
27	28
28	42
29	21
30	32
31	48
32	72
33	108
34	162
35	243
36	34
37	17
38	38
39	19
40	40
41	60
42	90
43	45
44	44
45	66
46	33
47	46
48	23
49	50
50	25
51	52
52	78
53	39
54	56
55	84
56	126
57	63
58	58
59	29
60	62
61	31
62	64
63	96
64	144
65	216
66	324
67	486
68	729
69	68
70	102
71	51
72	70
73	35
74	74
75	37
76	76
77	114
78	57