A368059 - cp's OEIS frontend

A368059 a(1)=3; for n>1, a(n) is the smallest positive integer not already used which has a factor sum in common with a(n-1).

n	a(n)
1	3
2	4
3	6
4	10
5	12
6	7
7	15
8	16
9	9
10	5
11	8
12	14
13	18
14	20
15	11
16	27
17	32
18	17
19	45
20	13
21	24
22	21
23	25
24	48
25	28
26	30
27	22
28	36
29	19
30	51
31	64
32	33
33	40
34	42
35	52
36	60
37	31
38	87
39	112
40	57
41	72
42	26
43	44
44	23
45	63
46	39
47	55
48	108
49	38
50	54
51	50
52	56
53	29
54	81
55	65
56	77
57	80
58	41
59	117
60	85
61	96
62	34
63	66
64	46
65	84
66	43
67	123
68	160
69	69
70	88
71	70
72	78
73	90
74	62

[3, 4, 6, 10, 12, 7, 15, 16, 9, 5, 8, 14, 18, 20, 11, 27, 32, 17, 45, 13, 24, 21, 25, 48, 28, 30, 22, 36, 19, 51, 64, 33, 40, 42, 52, 60, 31, 87, 112, 57, 72, 26, 44, 23, 63, 39, 55, 108, 38, 54, 50, 56, 29, 81, 65, 77, 80, 41, 117, 85, 96, 34, 66, 46, 84, 43, 123, 160, 69, 88, 70, 78, 90, 62]

cp's OEIS Frontend

A368059 a(1)=3; for n>1, a(n) is the smallest positive integer not already used which has a factor sum in common with a(n-1).

Table of values

List of values

n	a(n)
1	3
2	4
3	6
4	10
5	12
6	7
7	15
8	16
9	9
10	5
11	8
12	14
13	18
14	20
15	11
16	27
17	32
18	17
19	45
20	13
21	24
22	21
23	25
24	48
25	28
26	30
27	22
28	36
29	19
30	51
31	64
32	33
33	40
34	42
35	52
36	60
37	31
38	87
39	112
40	57
41	72
42	26
43	44
44	23
45	63
46	39
47	55
48	108
49	38
50	54
51	50
52	56
53	29
54	81
55	65
56	77
57	80
58	41
59	117
60	85
61	96
62	34
63	66
64	46
65	84
66	43
67	123
68	160
69	69
70	88
71	70
72	78
73	90
74	62

n	a(n)
1	3
2	4
3	6
4	10
5	12
6	7
7	15
8	16
9	9
10	5
11	8
12	14
13	18
14	20
15	11
16	27
17	32
18	17
19	45
20	13
21	24
22	21
23	25
24	48
25	28
26	30
27	22
28	36
29	19
30	51
31	64
32	33
33	40
34	42
35	52
36	60
37	31
38	87
39	112
40	57
41	72
42	26
43	44
44	23
45	63
46	39
47	55
48	108
49	38
50	54
51	50
52	56
53	29
54	81
55	65
56	77
57	80
58	41
59	117
60	85
61	96
62	34
63	66
64	46
65	84
66	43
67	123
68	160
69	69
70	88
71	70
72	78
73	90
74	62

n	a(n)
1	3
2	4
3	6
4	10
5	12
6	7
7	15
8	16
9	9
10	5
11	8
12	14
13	18
14	20
15	11
16	27
17	32
18	17
19	45
20	13
21	24
22	21
23	25
24	48
25	28
26	30
27	22
28	36
29	19
30	51
31	64
32	33
33	40
34	42
35	52
36	60
37	31
38	87
39	112
40	57
41	72
42	26
43	44
44	23
45	63
46	39
47	55
48	108
49	38
50	54
51	50
52	56
53	29
54	81
55	65
56	77
57	80
58	41
59	117
60	85
61	96
62	34
63	66
64	46
65	84
66	43
67	123
68	160
69	69
70	88
71	70
72	78
73	90
74	62