A081690 - OEIS

A081690 as a simple table

n	a(n)
0	0
1	1
2	3
3	4
4	5
5	7
6	8
7	9
8	10
9	12
10	13
11	14
12	15
13	16
14	17
15	18
16	19
17	21
18	22
19	23
20	24
21	25
22	26
23	27
24	28
25	29
26	30
27	31
28	32
29	33
30	34
31	35
32	36
33	37
34	39
35	40
36	41
37	42
38	43
39	44
40	45
41	46
42	47
43	48
44	49
45	50
46	51
47	52
48	53
49	54
50	55
51	56
52	57
53	58
54	59
55	60
56	61
57	62
58	63
59	64
60	65
61	66
62	67
63	68
64	69
65	70
66	72
67	73
68	74
69	75
70	76
71	77

[0,1,3,4,5,7,8,9,10,12,13,14,15,16,17,18,19,21,22, 23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,39, 40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55, 56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,72, 73,74,75,76,77]

n	a(n)
0	0
1	1
2	3
3	4
4	5
5	7
6	8
7	9
8	10
9	12
10	13
11	14
12	15
13	16
14	17
15	18
16	19
17	21
18	22
19	23
20	24
21	25
22	26
23	27
24	28
25	29
26	30
27	31
28	32
29	33
30	34
31	35
32	36
33	37
34	39
35	40
36	41
37	42
38	43
39	44
40	45
41	46
42	47
43	48
44	49
45	50
46	51
47	52
48	53
49	54
50	55
51	56
52	57
53	58
54	59
55	60
56	61
57	62
58	63
59	64
60	65
61	66
62	67
63	68
64	69
65	70
66	72
67	73
68	74
69	75
70	76
71	77

n	a(n)
0	0
1	1
2	3
3	4
4	5
5	7
6	8
7	9
8	10
9	12
10	13
11	14
12	15
13	16
14	17
15	18
16	19
17	21
18	22
19	23
20	24
21	25
22	26
23	27
24	28
25	29
26	30
27	31
28	32
29	33
30	34
31	35
32	36
33	37
34	39
35	40
36	41
37	42
38	43
39	44
40	45
41	46
42	47
43	48
44	49
45	50
46	51
47	52
48	53
49	54
50	55
51	56
52	57
53	58
54	59
55	60
56	61
57	62
58	63
59	64
60	65
61	66
62	67
63	68
64	69
65	70
66	72
67	73
68	74
69	75
70	76
71	77

n	a(n)
0	0
1	1
2	3
3	4
4	5
5	7
6	8
7	9
8	10
9	12
10	13
11	14
12	15
13	16
14	17
15	18
16	19
17	21
18	22
19	23
20	24
21	25
22	26
23	27
24	28
25	29
26	30
27	31
28	32
29	33
30	34
31	35
32	36
33	37
34	39
35	40
36	41
37	42
38	43
39	44
40	45
41	46
42	47
43	48
44	49
45	50
46	51
47	52
48	53
49	54
50	55
51	56
52	57
53	58
54	59
55	60
56	61
57	62
58	63
59	64
60	65
61	66
62	67
63	68
64	69
65	70
66	72
67	73
68	74
69	75
70	76
71	77