A127562 - cp's OEIS frontend

A127562 a(1)=1. a(2)=2. For n>=3, a(n) is the smallest positive integer not occurring earlier in the sequence such that (Sum_{k=1..n} a(k)) divides Product_{j=1..n} a(j).

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

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

cp's OEIS Frontend

A127562 a(1)=1. a(2)=2. For n>=3, a(n) is the smallest positive integer not occurring earlier in the sequence such that (Sum_{k=1..n} a(k)) divides Product_{j=1..n} a(j).

Table of values

List of values

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

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

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