A115303 - cp's OEIS frontend

A115303 a(n) = n if n < 3, otherwise 3*a(floor(n/3)) + 2 - n mod 3.

n	a(n)
1	1
2	2
3	5
4	4
5	3
6	8
7	7
8	6
9	17
10	16
11	15
12	14
13	13
14	12
15	11
16	10
17	9
18	26
19	25
20	24
21	23
22	22
23	21
24	20
25	19
26	18
27	53
28	52
29	51
30	50
31	49
32	48
33	47
34	46
35	45
36	44
37	43
38	42
39	41
40	40
41	39
42	38
43	37
44	36
45	35
46	34
47	33
48	32
49	31
50	30
51	29
52	28
53	27
54	80
55	79
56	78
57	77
58	76
59	75
60	74
61	73
62	72
63	71
64	70
65	69
66	68
67	67
68	66
69	65
70	64
71	63
72	62

[1, 2, 5, 4, 3, 8, 7, 6, 17, 16, 15, 14, 13, 12, 11, 10, 9, 26, 25, 24, 23, 22, 21, 20, 19, 18, 53, 52, 51, 50, 49, 48, 47, 46, 45, 44, 43, 42, 41, 40, 39, 38, 37, 36, 35, 34, 33, 32, 31, 30, 29, 28, 27, 80, 79, 78, 77, 76, 75, 74, 73, 72, 71, 70, 69, 68, 67, 66, 65, 64, 63, 62]

cp's OEIS Frontend

A115303 a(n) = n if n < 3, otherwise 3*a(floor(n/3)) + 2 - n mod 3.

Table of values

List of values

n	a(n)
1	1
2	2
3	5
4	4
5	3
6	8
7	7
8	6
9	17
10	16
11	15
12	14
13	13
14	12
15	11
16	10
17	9
18	26
19	25
20	24
21	23
22	22
23	21
24	20
25	19
26	18
27	53
28	52
29	51
30	50
31	49
32	48
33	47
34	46
35	45
36	44
37	43
38	42
39	41
40	40
41	39
42	38
43	37
44	36
45	35
46	34
47	33
48	32
49	31
50	30
51	29
52	28
53	27
54	80
55	79
56	78
57	77
58	76
59	75
60	74
61	73
62	72
63	71
64	70
65	69
66	68
67	67
68	66
69	65
70	64
71	63
72	62

n	a(n)
1	1
2	2
3	5
4	4
5	3
6	8
7	7
8	6
9	17
10	16
11	15
12	14
13	13
14	12
15	11
16	10
17	9
18	26
19	25
20	24
21	23
22	22
23	21
24	20
25	19
26	18
27	53
28	52
29	51
30	50
31	49
32	48
33	47
34	46
35	45
36	44
37	43
38	42
39	41
40	40
41	39
42	38
43	37
44	36
45	35
46	34
47	33
48	32
49	31
50	30
51	29
52	28
53	27
54	80
55	79
56	78
57	77
58	76
59	75
60	74
61	73
62	72
63	71
64	70
65	69
66	68
67	67
68	66
69	65
70	64
71	63
72	62

n	a(n)
1	1
2	2
3	5
4	4
5	3
6	8
7	7
8	6
9	17
10	16
11	15
12	14
13	13
14	12
15	11
16	10
17	9
18	26
19	25
20	24
21	23
22	22
23	21
24	20
25	19
26	18
27	53
28	52
29	51
30	50
31	49
32	48
33	47
34	46
35	45
36	44
37	43
38	42
39	41
40	40
41	39
42	38
43	37
44	36
45	35
46	34
47	33
48	32
49	31
50	30
51	29
52	28
53	27
54	80
55	79
56	78
57	77
58	76
59	75
60	74
61	73
62	72
63	71
64	70
65	69
66	68
67	67
68	66
69	65
70	64
71	63
72	62