A055563 - cp's OEIS frontend

A055563 a(n) = least number greater than a(n-1) not the sum of an earlier pair of consecutive terms, a(0) = 3.

n	a(n)
0	3
1	4
2	5
3	6
4	8
5	10
6	12
7	13
8	15
9	16
10	17
11	19
12	20
13	21
14	23
15	24
16	26
17	27
18	29
19	30
20	32
21	34
22	35
23	37
24	38
25	40
26	42
27	43
28	45
29	46
30	48
31	49
32	51
33	52
34	54
35	55
36	57
37	58
38	60
39	61
40	63
41	64
42	65
43	67
44	68
45	70
46	71
47	73
48	74
49	76
50	77
51	79
52	80
53	81
54	83
55	84
56	86
57	87
58	89
59	90
60	92
61	93
62	95
63	96
64	98
65	99
66	101
67	102
68	104
69	105

[3, 4, 5, 6, 8, 10, 12, 13, 15, 16, 17, 19, 20, 21, 23, 24, 26, 27, 29, 30, 32, 34, 35, 37, 38, 40, 42, 43, 45, 46, 48, 49, 51, 52, 54, 55, 57, 58, 60, 61, 63, 64, 65, 67, 68, 70, 71, 73, 74, 76, 77, 79, 80, 81, 83, 84, 86, 87, 89, 90, 92, 93, 95, 96, 98, 99, 101, 102, 104, 105]

cp's OEIS Frontend

A055563 a(n) = least number greater than a(n-1) not the sum of an earlier pair of consecutive terms, a(0) = 3.

Table of values

List of values

n	a(n)
0	3
1	4
2	5
3	6
4	8
5	10
6	12
7	13
8	15
9	16
10	17
11	19
12	20
13	21
14	23
15	24
16	26
17	27
18	29
19	30
20	32
21	34
22	35
23	37
24	38
25	40
26	42
27	43
28	45
29	46
30	48
31	49
32	51
33	52
34	54
35	55
36	57
37	58
38	60
39	61
40	63
41	64
42	65
43	67
44	68
45	70
46	71
47	73
48	74
49	76
50	77
51	79
52	80
53	81
54	83
55	84
56	86
57	87
58	89
59	90
60	92
61	93
62	95
63	96
64	98
65	99
66	101
67	102
68	104
69	105

n	a(n)
0	3
1	4
2	5
3	6
4	8
5	10
6	12
7	13
8	15
9	16
10	17
11	19
12	20
13	21
14	23
15	24
16	26
17	27
18	29
19	30
20	32
21	34
22	35
23	37
24	38
25	40
26	42
27	43
28	45
29	46
30	48
31	49
32	51
33	52
34	54
35	55
36	57
37	58
38	60
39	61
40	63
41	64
42	65
43	67
44	68
45	70
46	71
47	73
48	74
49	76
50	77
51	79
52	80
53	81
54	83
55	84
56	86
57	87
58	89
59	90
60	92
61	93
62	95
63	96
64	98
65	99
66	101
67	102
68	104
69	105

n	a(n)
0	3
1	4
2	5
3	6
4	8
5	10
6	12
7	13
8	15
9	16
10	17
11	19
12	20
13	21
14	23
15	24
16	26
17	27
18	29
19	30
20	32
21	34
22	35
23	37
24	38
25	40
26	42
27	43
28	45
29	46
30	48
31	49
32	51
33	52
34	54
35	55
36	57
37	58
38	60
39	61
40	63
41	64
42	65
43	67
44	68
45	70
46	71
47	73
48	74
49	76
50	77
51	79
52	80
53	81
54	83
55	84
56	86
57	87
58	89
59	90
60	92
61	93
62	95
63	96
64	98
65	99
66	101
67	102
68	104
69	105