A138750 - cp's OEIS frontend

A138750 a(n) = ceiling(n/2) if n == 2 (mod 3), a(n) = 2n otherwise.

n	a(n)
0	0
1	2
2	1
3	6
4	8
5	3
6	12
7	14
8	4
9	18
10	20
11	6
12	24
13	26
14	7
15	30
16	32
17	9
18	36
19	38
20	10
21	42
22	44
23	12
24	48
25	50
26	13
27	54
28	56
29	15
30	60
31	62
32	16
33	66
34	68
35	18
36	72
37	74
38	19
39	78
40	80
41	21
42	84
43	86
44	22
45	90
46	92
47	24
48	96
49	98
50	25
51	102
52	104
53	27
54	108
55	110
56	28
57	114
58	116
59	30
60	120
61	122
62	31
63	126
64	128
65	33
66	132
67	134
68	34

[0, 2, 1, 6, 8, 3, 12, 14, 4, 18, 20, 6, 24, 26, 7, 30, 32, 9, 36, 38, 10, 42, 44, 12, 48, 50, 13, 54, 56, 15, 60, 62, 16, 66, 68, 18, 72, 74, 19, 78, 80, 21, 84, 86, 22, 90, 92, 24, 96, 98, 25, 102, 104, 27, 108, 110, 28, 114, 116, 30, 120, 122, 31, 126, 128, 33, 132, 134, 34]

cp's OEIS Frontend

A138750 a(n) = ceiling(n/2) if n == 2 (mod 3), a(n) = 2n otherwise.

Table of values

List of values

n	a(n)
0	0
1	2
2	1
3	6
4	8
5	3
6	12
7	14
8	4
9	18
10	20
11	6
12	24
13	26
14	7
15	30
16	32
17	9
18	36
19	38
20	10
21	42
22	44
23	12
24	48
25	50
26	13
27	54
28	56
29	15
30	60
31	62
32	16
33	66
34	68
35	18
36	72
37	74
38	19
39	78
40	80
41	21
42	84
43	86
44	22
45	90
46	92
47	24
48	96
49	98
50	25
51	102
52	104
53	27
54	108
55	110
56	28
57	114
58	116
59	30
60	120
61	122
62	31
63	126
64	128
65	33
66	132
67	134
68	34

n	a(n)
0	0
1	2
2	1
3	6
4	8
5	3
6	12
7	14
8	4
9	18
10	20
11	6
12	24
13	26
14	7
15	30
16	32
17	9
18	36
19	38
20	10
21	42
22	44
23	12
24	48
25	50
26	13
27	54
28	56
29	15
30	60
31	62
32	16
33	66
34	68
35	18
36	72
37	74
38	19
39	78
40	80
41	21
42	84
43	86
44	22
45	90
46	92
47	24
48	96
49	98
50	25
51	102
52	104
53	27
54	108
55	110
56	28
57	114
58	116
59	30
60	120
61	122
62	31
63	126
64	128
65	33
66	132
67	134
68	34

n	a(n)
0	0
1	2
2	1
3	6
4	8
5	3
6	12
7	14
8	4
9	18
10	20
11	6
12	24
13	26
14	7
15	30
16	32
17	9
18	36
19	38
20	10
21	42
22	44
23	12
24	48
25	50
26	13
27	54
28	56
29	15
30	60
31	62
32	16
33	66
34	68
35	18
36	72
37	74
38	19
39	78
40	80
41	21
42	84
43	86
44	22
45	90
46	92
47	24
48	96
49	98
50	25
51	102
52	104
53	27
54	108
55	110
56	28
57	114
58	116
59	30
60	120
61	122
62	31
63	126
64	128
65	33
66	132
67	134
68	34