A026433 - cp's OEIS frontend

A026433 a(n) = least positive integer > a(n-1) and not a(i)*a(j)-1 for 1<=i with initial terms 2,3.

n	a(n)
1	2
2	3
3	4
4	6
5	8
6	9
7	10
8	12
9	13
10	14
11	16
12	18
13	20
14	21
15	22
16	24
17	28
18	30
19	32
20	33
21	34
22	36
23	37
24	40
25	42
26	44
27	45
28	46
29	48
30	49
31	50
32	52
33	54
34	56
35	57
36	58
37	60
38	61
39	64
40	66
41	68
42	69
43	70
44	72
45	74
46	75
47	76
48	78
49	80
50	81
51	82
52	84
53	85
54	86
55	88
56	90
57	92
58	93
59	94
60	96

[2, 3, 4, 6, 8, 9, 10, 12, 13, 14, 16, 18, 20, 21, 22, 24, 28, 30, 32, 33, 34, 36, 37, 40, 42, 44, 45, 46, 48, 49, 50, 52, 54, 56, 57, 58, 60, 61, 64, 66, 68, 69, 70, 72, 74, 75, 76, 78, 80, 81, 82, 84, 85, 86, 88, 90, 92, 93, 94, 96]

cp's OEIS Frontend

A026433 a(n) = least positive integer > a(n-1) and not a(i)*a(j)-1 for 1<=i with initial terms 2,3.

Table of values

List of values

n	a(n)
1	2
2	3
3	4
4	6
5	8
6	9
7	10
8	12
9	13
10	14
11	16
12	18
13	20
14	21
15	22
16	24
17	28
18	30
19	32
20	33
21	34
22	36
23	37
24	40
25	42
26	44
27	45
28	46
29	48
30	49
31	50
32	52
33	54
34	56
35	57
36	58
37	60
38	61
39	64
40	66
41	68
42	69
43	70
44	72
45	74
46	75
47	76
48	78
49	80
50	81
51	82
52	84
53	85
54	86
55	88
56	90
57	92
58	93
59	94
60	96

n	a(n)
1	2
2	3
3	4
4	6
5	8
6	9
7	10
8	12
9	13
10	14
11	16
12	18
13	20
14	21
15	22
16	24
17	28
18	30
19	32
20	33
21	34
22	36
23	37
24	40
25	42
26	44
27	45
28	46
29	48
30	49
31	50
32	52
33	54
34	56
35	57
36	58
37	60
38	61
39	64
40	66
41	68
42	69
43	70
44	72
45	74
46	75
47	76
48	78
49	80
50	81
51	82
52	84
53	85
54	86
55	88
56	90
57	92
58	93
59	94
60	96

n	a(n)
1	2
2	3
3	4
4	6
5	8
6	9
7	10
8	12
9	13
10	14
11	16
12	18
13	20
14	21
15	22
16	24
17	28
18	30
19	32
20	33
21	34
22	36
23	37
24	40
25	42
26	44
27	45
28	46
29	48
30	49
31	50
32	52
33	54
34	56
35	57
36	58
37	60
38	61
39	64
40	66
41	68
42	69
43	70
44	72
45	74
46	75
47	76
48	78
49	80
50	81
51	82
52	84
53	85
54	86
55	88
56	90
57	92
58	93
59	94
60	96