A055562 - cp's OEIS frontend

A055562 a(n) = least number greater than a(n-1) not the sum of an earlier pair of consecutive terms, a(0) = 2.

n	a(n)
0	2
1	3
2	4
3	6
4	8
5	9
6	11
7	12
8	13
9	15
10	16
11	18
12	19
13	21
14	22
15	24
16	26
17	27
18	29
19	30
20	32
21	33
22	35
23	36
24	38
25	39
26	41
27	42
28	44
29	45
30	47
31	48
32	49
33	51
34	52
35	54
36	55
37	57
38	58
39	60
40	61
41	63
42	64
43	66
44	67
45	69
46	70
47	72
48	73
49	75
50	76
51	78
52	79
53	81
54	82
55	84
56	85
57	87
58	88
59	90
60	91
61	93
62	94
63	96
64	98
65	99
66	101
67	102
68	104
69	105

[2, 3, 4, 6, 8, 9, 11, 12, 13, 15, 16, 18, 19, 21, 22, 24, 26, 27, 29, 30, 32, 33, 35, 36, 38, 39, 41, 42, 44, 45, 47, 48, 49, 51, 52, 54, 55, 57, 58, 60, 61, 63, 64, 66, 67, 69, 70, 72, 73, 75, 76, 78, 79, 81, 82, 84, 85, 87, 88, 90, 91, 93, 94, 96, 98, 99, 101, 102, 104, 105]

cp's OEIS Frontend

A055562 a(n) = least number greater than a(n-1) not the sum of an earlier pair of consecutive terms, a(0) = 2.

Table of values

List of values

n	a(n)
0	2
1	3
2	4
3	6
4	8
5	9
6	11
7	12
8	13
9	15
10	16
11	18
12	19
13	21
14	22
15	24
16	26
17	27
18	29
19	30
20	32
21	33
22	35
23	36
24	38
25	39
26	41
27	42
28	44
29	45
30	47
31	48
32	49
33	51
34	52
35	54
36	55
37	57
38	58
39	60
40	61
41	63
42	64
43	66
44	67
45	69
46	70
47	72
48	73
49	75
50	76
51	78
52	79
53	81
54	82
55	84
56	85
57	87
58	88
59	90
60	91
61	93
62	94
63	96
64	98
65	99
66	101
67	102
68	104
69	105

n	a(n)
0	2
1	3
2	4
3	6
4	8
5	9
6	11
7	12
8	13
9	15
10	16
11	18
12	19
13	21
14	22
15	24
16	26
17	27
18	29
19	30
20	32
21	33
22	35
23	36
24	38
25	39
26	41
27	42
28	44
29	45
30	47
31	48
32	49
33	51
34	52
35	54
36	55
37	57
38	58
39	60
40	61
41	63
42	64
43	66
44	67
45	69
46	70
47	72
48	73
49	75
50	76
51	78
52	79
53	81
54	82
55	84
56	85
57	87
58	88
59	90
60	91
61	93
62	94
63	96
64	98
65	99
66	101
67	102
68	104
69	105

n	a(n)
0	2
1	3
2	4
3	6
4	8
5	9
6	11
7	12
8	13
9	15
10	16
11	18
12	19
13	21
14	22
15	24
16	26
17	27
18	29
19	30
20	32
21	33
22	35
23	36
24	38
25	39
26	41
27	42
28	44
29	45
30	47
31	48
32	49
33	51
34	52
35	54
36	55
37	57
38	58
39	60
40	61
41	63
42	64
43	66
44	67
45	69
46	70
47	72
48	73
49	75
50	76
51	78
52	79
53	81
54	82
55	84
56	85
57	87
58	88
59	90
60	91
61	93
62	94
63	96
64	98
65	99
66	101
67	102
68	104
69	105