A002251 - cp's OEIS frontend

A002251 Start with the nonnegative integers; then swap L(k) and U(k) for all k >= 1, where L = A000201, U = A001950 (lower and upper Wythoff sequences).

n	a(n)
0	0
1	2
2	1
3	5
4	7
5	3
6	10
7	4
8	13
9	15
10	6
11	18
12	20
13	8
14	23
15	9
16	26
17	28
18	11
19	31
20	12
21	34
22	36
23	14
24	39
25	41
26	16
27	44
28	17
29	47
30	49
31	19
32	52
33	54
34	21
35	57
36	22
37	60
38	62
39	24
40	65
41	25
42	68
43	70
44	27
45	73
46	75
47	29
48	78
49	30
50	81
51	83
52	32
53	86
54	33
55	89
56	91
57	35
58	94
59	96
60	37
61	99
62	38
63	102
64	104
65	40
66	107
67	109

[0, 2, 1, 5, 7, 3, 10, 4, 13, 15, 6, 18, 20, 8, 23, 9, 26, 28, 11, 31, 12, 34, 36, 14, 39, 41, 16, 44, 17, 47, 49, 19, 52, 54, 21, 57, 22, 60, 62, 24, 65, 25, 68, 70, 27, 73, 75, 29, 78, 30, 81, 83, 32, 86, 33, 89, 91, 35, 94, 96, 37, 99, 38, 102, 104, 40, 107, 109]

cp's OEIS Frontend

A002251 Start with the nonnegative integers; then swap L(k) and U(k) for all k >= 1, where L = A000201, U = A001950 (lower and upper Wythoff sequences).

Table of values

List of values

n	a(n)
0	0
1	2
2	1
3	5
4	7
5	3
6	10
7	4
8	13
9	15
10	6
11	18
12	20
13	8
14	23
15	9
16	26
17	28
18	11
19	31
20	12
21	34
22	36
23	14
24	39
25	41
26	16
27	44
28	17
29	47
30	49
31	19
32	52
33	54
34	21
35	57
36	22
37	60
38	62
39	24
40	65
41	25
42	68
43	70
44	27
45	73
46	75
47	29
48	78
49	30
50	81
51	83
52	32
53	86
54	33
55	89
56	91
57	35
58	94
59	96
60	37
61	99
62	38
63	102
64	104
65	40
66	107
67	109

n	a(n)
0	0
1	2
2	1
3	5
4	7
5	3
6	10
7	4
8	13
9	15
10	6
11	18
12	20
13	8
14	23
15	9
16	26
17	28
18	11
19	31
20	12
21	34
22	36
23	14
24	39
25	41
26	16
27	44
28	17
29	47
30	49
31	19
32	52
33	54
34	21
35	57
36	22
37	60
38	62
39	24
40	65
41	25
42	68
43	70
44	27
45	73
46	75
47	29
48	78
49	30
50	81
51	83
52	32
53	86
54	33
55	89
56	91
57	35
58	94
59	96
60	37
61	99
62	38
63	102
64	104
65	40
66	107
67	109

n	a(n)
0	0
1	2
2	1
3	5
4	7
5	3
6	10
7	4
8	13
9	15
10	6
11	18
12	20
13	8
14	23
15	9
16	26
17	28
18	11
19	31
20	12
21	34
22	36
23	14
24	39
25	41
26	16
27	44
28	17
29	47
30	49
31	19
32	52
33	54
34	21
35	57
36	22
37	60
38	62
39	24
40	65
41	25
42	68
43	70
44	27
45	73
46	75
47	29
48	78
49	30
50	81
51	83
52	32
53	86
54	33
55	89
56	91
57	35
58	94
59	96
60	37
61	99
62	38
63	102
64	104
65	40
66	107
67	109