A325597 - cp's OEIS frontend

A325597 a(n) is the least number not 2a(m) + a(m-1) for any m < n.

n	a(n)
1	1
2	2
3	3
4	4
5	6
6	7
7	9
8	10
9	12
10	13
11	14
12	15
13	17
14	18
15	19
16	21
17	22
18	23
19	24
20	26
21	27
22	28
23	30
24	31
25	32
26	33
27	35
28	36
29	37
30	39
31	40
32	42
33	43
34	45
35	46
36	47
37	48
38	50
39	51
40	52
41	54
42	55
43	57
44	58
45	59
46	60
47	62
48	63
49	64
50	66
51	67
52	69
53	70
54	72
55	73
56	74
57	75
58	77
59	78
60	79
61	81
62	82
63	84
64	85
65	86
66	87

[1, 2, 3, 4, 6, 7, 9, 10, 12, 13, 14, 15, 17, 18, 19, 21, 22, 23, 24, 26, 27, 28, 30, 31, 32, 33, 35, 36, 37, 39, 40, 42, 43, 45, 46, 47, 48, 50, 51, 52, 54, 55, 57, 58, 59, 60, 62, 63, 64, 66, 67, 69, 70, 72, 73, 74, 75, 77, 78, 79, 81, 82, 84, 85, 86, 87]

cp's OEIS Frontend

A325597 a(n) is the least number not 2a(m) + a(m-1) for any m < n.

Table of values

List of values

n	a(n)
1	1
2	2
3	3
4	4
5	6
6	7
7	9
8	10
9	12
10	13
11	14
12	15
13	17
14	18
15	19
16	21
17	22
18	23
19	24
20	26
21	27
22	28
23	30
24	31
25	32
26	33
27	35
28	36
29	37
30	39
31	40
32	42
33	43
34	45
35	46
36	47
37	48
38	50
39	51
40	52
41	54
42	55
43	57
44	58
45	59
46	60
47	62
48	63
49	64
50	66
51	67
52	69
53	70
54	72
55	73
56	74
57	75
58	77
59	78
60	79
61	81
62	82
63	84
64	85
65	86
66	87

n	a(n)
1	1
2	2
3	3
4	4
5	6
6	7
7	9
8	10
9	12
10	13
11	14
12	15
13	17
14	18
15	19
16	21
17	22
18	23
19	24
20	26
21	27
22	28
23	30
24	31
25	32
26	33
27	35
28	36
29	37
30	39
31	40
32	42
33	43
34	45
35	46
36	47
37	48
38	50
39	51
40	52
41	54
42	55
43	57
44	58
45	59
46	60
47	62
48	63
49	64
50	66
51	67
52	69
53	70
54	72
55	73
56	74
57	75
58	77
59	78
60	79
61	81
62	82
63	84
64	85
65	86
66	87

n	a(n)
1	1
2	2
3	3
4	4
5	6
6	7
7	9
8	10
9	12
10	13
11	14
12	15
13	17
14	18
15	19
16	21
17	22
18	23
19	24
20	26
21	27
22	28
23	30
24	31
25	32
26	33
27	35
28	36
29	37
30	39
31	40
32	42
33	43
34	45
35	46
36	47
37	48
38	50
39	51
40	52
41	54
42	55
43	57
44	58
45	59
46	60
47	62
48	63
49	64
50	66
51	67
52	69
53	70
54	72
55	73
56	74
57	75
58	77
59	78
60	79
61	81
62	82
63	84
64	85
65	86
66	87