A113790 - OEIS

A113790 as a simple table

n	a(n)
1	2
2	1
3	3
4	5
5	4
6	7
7	6
8	8
9	10
10	9
11	12
12	11
13	13
14	15
15	14
16	17
17	16
18	18
19	20
20	19
21	22
22	21
23	23
24	25
25	24
26	27
27	26
28	28
29	30
30	29
31	32
32	31
33	33
34	35
35	34
36	37
37	36
38	38
39	40
40	39
41	42
42	41
43	43
44	45
45	44
46	47
47	46
48	48
49	50
50	49
51	52
52	51
53	53
54	55
55	54
56	57
57	56
58	58
59	60
60	59
61	62
62	61
63	63
64	65
65	64
66	67
67	66
68	68
69	70
70	69
71	72
72	71

[2,1,3,5,4,7,6,8,10,9,12,11,13,15,14,17,16,18,20, 19,22,21,23,25,24,27,26,28,30,29,32,31,33,35,34, 37,36,38,40,39,42,41,43,45,44,47,46,48,50,49,52, 51,53,55,54,57,56,58,60,59,62,61,63,65,64,67,66, 68,70,69,72,71]

n	a(n)
1	2
2	1
3	3
4	5
5	4
6	7
7	6
8	8
9	10
10	9
11	12
12	11
13	13
14	15
15	14
16	17
17	16
18	18
19	20
20	19
21	22
22	21
23	23
24	25
25	24
26	27
27	26
28	28
29	30
30	29
31	32
32	31
33	33
34	35
35	34
36	37
37	36
38	38
39	40
40	39
41	42
42	41
43	43
44	45
45	44
46	47
47	46
48	48
49	50
50	49
51	52
52	51
53	53
54	55
55	54
56	57
57	56
58	58
59	60
60	59
61	62
62	61
63	63
64	65
65	64
66	67
67	66
68	68
69	70
70	69
71	72
72	71

n	a(n)
1	2
2	1
3	3
4	5
5	4
6	7
7	6
8	8
9	10
10	9
11	12
12	11
13	13
14	15
15	14
16	17
17	16
18	18
19	20
20	19
21	22
22	21
23	23
24	25
25	24
26	27
27	26
28	28
29	30
30	29
31	32
32	31
33	33
34	35
35	34
36	37
37	36
38	38
39	40
40	39
41	42
42	41
43	43
44	45
45	44
46	47
47	46
48	48
49	50
50	49
51	52
52	51
53	53
54	55
55	54
56	57
57	56
58	58
59	60
60	59
61	62
62	61
63	63
64	65
65	64
66	67
67	66
68	68
69	70
70	69
71	72
72	71

n	a(n)
1	2
2	1
3	3
4	5
5	4
6	7
7	6
8	8
9	10
10	9
11	12
12	11
13	13
14	15
15	14
16	17
17	16
18	18
19	20
20	19
21	22
22	21
23	23
24	25
25	24
26	27
27	26
28	28
29	30
30	29
31	32
32	31
33	33
34	35
35	34
36	37
37	36
38	38
39	40
40	39
41	42
42	41
43	43
44	45
45	44
46	47
47	46
48	48
49	50
50	49
51	52
52	51
53	53
54	55
55	54
56	57
57	56
58	58
59	60
60	59
61	62
62	61
63	63
64	65
65	64
66	67
67	66
68	68
69	70
70	69
71	72
72	71