A099467 - cp's OEIS frontend

A099467 a(1) = a(2) = 1; for n > 2, a(n) is the smallest number > a(n-1) which is not the sum of 2 consecutive elements of the sequence.

n	a(n)
1	1
2	1
3	3
4	5
5	6
6	7
7	9
8	10
9	12
10	14
11	15
12	17
13	18
14	20
15	21
16	23
17	24
18	25
19	27
20	28
21	30
22	31
23	33
24	34
25	36
26	37
27	39
28	40
29	42
30	43
31	45
32	46
33	48
34	50
35	51
36	53
37	54
38	56
39	57
40	59
41	60
42	62
43	63
44	65
45	66
46	68
47	69
48	71
49	72
50	74
51	75
52	77
53	78
54	80
55	81
56	83
57	84
58	86
59	87
60	89
61	90
62	92
63	93
64	95
65	96
66	97

[1, 1, 3, 5, 6, 7, 9, 10, 12, 14, 15, 17, 18, 20, 21, 23, 24, 25, 27, 28, 30, 31, 33, 34, 36, 37, 39, 40, 42, 43, 45, 46, 48, 50, 51, 53, 54, 56, 57, 59, 60, 62, 63, 65, 66, 68, 69, 71, 72, 74, 75, 77, 78, 80, 81, 83, 84, 86, 87, 89, 90, 92, 93, 95, 96, 97]

cp's OEIS Frontend

A099467 a(1) = a(2) = 1; for n > 2, a(n) is the smallest number > a(n-1) which is not the sum of 2 consecutive elements of the sequence.

Table of values

List of values

n	a(n)
1	1
2	1
3	3
4	5
5	6
6	7
7	9
8	10
9	12
10	14
11	15
12	17
13	18
14	20
15	21
16	23
17	24
18	25
19	27
20	28
21	30
22	31
23	33
24	34
25	36
26	37
27	39
28	40
29	42
30	43
31	45
32	46
33	48
34	50
35	51
36	53
37	54
38	56
39	57
40	59
41	60
42	62
43	63
44	65
45	66
46	68
47	69
48	71
49	72
50	74
51	75
52	77
53	78
54	80
55	81
56	83
57	84
58	86
59	87
60	89
61	90
62	92
63	93
64	95
65	96
66	97

n	a(n)
1	1
2	1
3	3
4	5
5	6
6	7
7	9
8	10
9	12
10	14
11	15
12	17
13	18
14	20
15	21
16	23
17	24
18	25
19	27
20	28
21	30
22	31
23	33
24	34
25	36
26	37
27	39
28	40
29	42
30	43
31	45
32	46
33	48
34	50
35	51
36	53
37	54
38	56
39	57
40	59
41	60
42	62
43	63
44	65
45	66
46	68
47	69
48	71
49	72
50	74
51	75
52	77
53	78
54	80
55	81
56	83
57	84
58	86
59	87
60	89
61	90
62	92
63	93
64	95
65	96
66	97

n	a(n)
1	1
2	1
3	3
4	5
5	6
6	7
7	9
8	10
9	12
10	14
11	15
12	17
13	18
14	20
15	21
16	23
17	24
18	25
19	27
20	28
21	30
22	31
23	33
24	34
25	36
26	37
27	39
28	40
29	42
30	43
31	45
32	46
33	48
34	50
35	51
36	53
37	54
38	56
39	57
40	59
41	60
42	62
43	63
44	65
45	66
46	68
47	69
48	71
49	72
50	74
51	75
52	77
53	78
54	80
55	81
56	83
57	84
58	86
59	87
60	89
61	90
62	92
63	93
64	95
65	96
66	97