A300813 - cp's OEIS frontend

A300813 a(n) is the smallest multiple of A001414(a(n-1)) not yet seen in the sequence; a(1)=2.

n	a(n)
1	2
2	4
3	8
4	6
5	5
6	10
7	7
8	14
9	9
10	12
11	21
12	20
13	18
14	16
15	24
16	27
17	36
18	30
19	40
20	11
21	22
22	13
23	26
24	15
25	32
26	50
27	48
28	33
29	28
30	44
31	45
32	55
33	64
34	60
35	72
36	84
37	42
38	96
39	39
40	80
41	52
42	17
43	34
44	19
45	38
46	63
47	65
48	54
49	66
50	112
51	75
52	78
53	90
54	91
55	100
56	56
57	104
58	57
59	88
60	51
61	120
62	70
63	98
64	128
65	126
66	105
67	135
68	140
69	144
70	154
71	160
72	150
73	165
74	76
75	23

[2, 4, 8, 6, 5, 10, 7, 14, 9, 12, 21, 20, 18, 16, 24, 27, 36, 30, 40, 11, 22, 13, 26, 15, 32, 50, 48, 33, 28, 44, 45, 55, 64, 60, 72, 84, 42, 96, 39, 80, 52, 17, 34, 19, 38, 63, 65, 54, 66, 112, 75, 78, 90, 91, 100, 56, 104, 57, 88, 51, 120, 70, 98, 128, 126, 105, 135, 140, 144, 154, 160, 150, 165, 76, 23]

cp's OEIS Frontend

A300813 a(n) is the smallest multiple of A001414(a(n-1)) not yet seen in the sequence; a(1)=2.

Table of values

List of values

n	a(n)
1	2
2	4
3	8
4	6
5	5
6	10
7	7
8	14
9	9
10	12
11	21
12	20
13	18
14	16
15	24
16	27
17	36
18	30
19	40
20	11
21	22
22	13
23	26
24	15
25	32
26	50
27	48
28	33
29	28
30	44
31	45
32	55
33	64
34	60
35	72
36	84
37	42
38	96
39	39
40	80
41	52
42	17
43	34
44	19
45	38
46	63
47	65
48	54
49	66
50	112
51	75
52	78
53	90
54	91
55	100
56	56
57	104
58	57
59	88
60	51
61	120
62	70
63	98
64	128
65	126
66	105
67	135
68	140
69	144
70	154
71	160
72	150
73	165
74	76
75	23

n	a(n)
1	2
2	4
3	8
4	6
5	5
6	10
7	7
8	14
9	9
10	12
11	21
12	20
13	18
14	16
15	24
16	27
17	36
18	30
19	40
20	11
21	22
22	13
23	26
24	15
25	32
26	50
27	48
28	33
29	28
30	44
31	45
32	55
33	64
34	60
35	72
36	84
37	42
38	96
39	39
40	80
41	52
42	17
43	34
44	19
45	38
46	63
47	65
48	54
49	66
50	112
51	75
52	78
53	90
54	91
55	100
56	56
57	104
58	57
59	88
60	51
61	120
62	70
63	98
64	128
65	126
66	105
67	135
68	140
69	144
70	154
71	160
72	150
73	165
74	76
75	23

n	a(n)
1	2
2	4
3	8
4	6
5	5
6	10
7	7
8	14
9	9
10	12
11	21
12	20
13	18
14	16
15	24
16	27
17	36
18	30
19	40
20	11
21	22
22	13
23	26
24	15
25	32
26	50
27	48
28	33
29	28
30	44
31	45
32	55
33	64
34	60
35	72
36	84
37	42
38	96
39	39
40	80
41	52
42	17
43	34
44	19
45	38
46	63
47	65
48	54
49	66
50	112
51	75
52	78
53	90
54	91
55	100
56	56
57	104
58	57
59	88
60	51
61	120
62	70
63	98
64	128
65	126
66	105
67	135
68	140
69	144
70	154
71	160
72	150
73	165
74	76
75	23