A022437 - cp's OEIS frontend

A022437 a(n) = c(n-1) + c(n-3) where c is the sequence of numbers not in a.

n	a(n)
0	2
1	3
2	4
3	7
4	13
5	15
6	18
7	20
8	22
9	25
10	28
11	31
12	35
13	38
14	42
15	45
16	49
17	51
18	55
19	57
20	61
21	63
22	66
23	69
24	71
25	75
26	77
27	80
28	83
29	85
30	89
31	91
32	94
33	97
34	100
35	103
36	106
37	109
38	112
39	115
40	118
41	121
42	124
43	127
44	131
45	133

[2, 3, 4, 7, 13, 15, 18, 20, 22, 25, 28, 31, 35, 38, 42, 45, 49, 51, 55, 57, 61, 63, 66, 69, 71, 75, 77, 80, 83, 85, 89, 91, 94, 97, 100, 103, 106, 109, 112, 115, 118, 121, 124, 127, 131, 133]

cp's OEIS Frontend

A022437 a(n) = c(n-1) + c(n-3) where c is the sequence of numbers not in a.

Table of values

List of values

n	a(n)
0	2
1	3
2	4
3	7
4	13
5	15
6	18
7	20
8	22
9	25
10	28
11	31
12	35
13	38
14	42
15	45
16	49
17	51
18	55
19	57
20	61
21	63
22	66
23	69
24	71
25	75
26	77
27	80
28	83
29	85
30	89
31	91
32	94
33	97
34	100
35	103
36	106
37	109
38	112
39	115
40	118
41	121
42	124
43	127
44	131
45	133

n	a(n)
0	2
1	3
2	4
3	7
4	13
5	15
6	18
7	20
8	22
9	25
10	28
11	31
12	35
13	38
14	42
15	45
16	49
17	51
18	55
19	57
20	61
21	63
22	66
23	69
24	71
25	75
26	77
27	80
28	83
29	85
30	89
31	91
32	94
33	97
34	100
35	103
36	106
37	109
38	112
39	115
40	118
41	121
42	124
43	127
44	131
45	133

n	a(n)
0	2
1	3
2	4
3	7
4	13
5	15
6	18
7	20
8	22
9	25
10	28
11	31
12	35
13	38
14	42
15	45
16	49
17	51
18	55
19	57
20	61
21	63
22	66
23	69
24	71
25	75
26	77
27	80
28	83
29	85
30	89
31	91
32	94
33	97
34	100
35	103
36	106
37	109
38	112
39	115
40	118
41	121
42	124
43	127
44	131
45	133