A321220 - cp's OEIS frontend

A321220 a(n) = n+2 if n is even, otherwise a(n) = 2*n+1 if n is odd.

n	a(n)
0	2
1	3
2	4
3	7
4	6
5	11
6	8
7	15
8	10
9	19
10	12
11	23
12	14
13	27
14	16
15	31
16	18
17	35
18	20
19	39
20	22
21	43
22	24
23	47
24	26
25	51
26	28
27	55
28	30
29	59
30	32
31	63
32	34
33	67
34	36
35	71
36	38
37	75
38	40
39	79
40	42
41	83
42	44
43	87
44	46
45	91
46	48
47	95
48	50
49	99
50	52
51	103
52	54
53	107
54	56
55	111
56	58
57	115
58	60
59	119
60	62
61	123
62	64
63	127
64	66

[2, 3, 4, 7, 6, 11, 8, 15, 10, 19, 12, 23, 14, 27, 16, 31, 18, 35, 20, 39, 22, 43, 24, 47, 26, 51, 28, 55, 30, 59, 32, 63, 34, 67, 36, 71, 38, 75, 40, 79, 42, 83, 44, 87, 46, 91, 48, 95, 50, 99, 52, 103, 54, 107, 56, 111, 58, 115, 60, 119, 62, 123, 64, 127, 66]

cp's OEIS Frontend

A321220 a(n) = n+2 if n is even, otherwise a(n) = 2*n+1 if n is odd.

Table of values

List of values

n	a(n)
0	2
1	3
2	4
3	7
4	6
5	11
6	8
7	15
8	10
9	19
10	12
11	23
12	14
13	27
14	16
15	31
16	18
17	35
18	20
19	39
20	22
21	43
22	24
23	47
24	26
25	51
26	28
27	55
28	30
29	59
30	32
31	63
32	34
33	67
34	36
35	71
36	38
37	75
38	40
39	79
40	42
41	83
42	44
43	87
44	46
45	91
46	48
47	95
48	50
49	99
50	52
51	103
52	54
53	107
54	56
55	111
56	58
57	115
58	60
59	119
60	62
61	123
62	64
63	127
64	66

n	a(n)
0	2
1	3
2	4
3	7
4	6
5	11
6	8
7	15
8	10
9	19
10	12
11	23
12	14
13	27
14	16
15	31
16	18
17	35
18	20
19	39
20	22
21	43
22	24
23	47
24	26
25	51
26	28
27	55
28	30
29	59
30	32
31	63
32	34
33	67
34	36
35	71
36	38
37	75
38	40
39	79
40	42
41	83
42	44
43	87
44	46
45	91
46	48
47	95
48	50
49	99
50	52
51	103
52	54
53	107
54	56
55	111
56	58
57	115
58	60
59	119
60	62
61	123
62	64
63	127
64	66

n	a(n)
0	2
1	3
2	4
3	7
4	6
5	11
6	8
7	15
8	10
9	19
10	12
11	23
12	14
13	27
14	16
15	31
16	18
17	35
18	20
19	39
20	22
21	43
22	24
23	47
24	26
25	51
26	28
27	55
28	30
29	59
30	32
31	63
32	34
33	67
34	36
35	71
36	38
37	75
38	40
39	79
40	42
41	83
42	44
43	87
44	46
45	91
46	48
47	95
48	50
49	99
50	52
51	103
52	54
53	107
54	56
55	111
56	58
57	115
58	60
59	119
60	62
61	123
62	64
63	127
64	66