A026436 - cp's OEIS frontend

A026436 a(n) = least positive integer > a(n-1) and not a(i)*a(j)-1 for 1<=i with initial terms 3,4.

n	a(n)
1	3
2	4
3	5
4	6
5	7
6	8
7	9
8	10
9	12
10	13
11	15
12	16
13	18
14	21
15	22
16	24
17	25
18	28
19	30
20	32
21	33
22	36
23	37
24	40
25	42
26	43
27	45
28	46
29	48
30	50
31	52
32	54
33	56
34	57
35	58
36	60
37	61
38	66
39	67
40	68
41	70
42	72
43	73
44	75
45	76
46	78
47	80
48	81
49	82
50	84
51	85
52	86
53	88
54	91
55	92
56	93
57	94
58	96
59	97
60	100

[3, 4, 5, 6, 7, 8, 9, 10, 12, 13, 15, 16, 18, 21, 22, 24, 25, 28, 30, 32, 33, 36, 37, 40, 42, 43, 45, 46, 48, 50, 52, 54, 56, 57, 58, 60, 61, 66, 67, 68, 70, 72, 73, 75, 76, 78, 80, 81, 82, 84, 85, 86, 88, 91, 92, 93, 94, 96, 97, 100]

cp's OEIS Frontend

A026436 a(n) = least positive integer > a(n-1) and not a(i)*a(j)-1 for 1<=i with initial terms 3,4.

Table of values

List of values

n	a(n)
1	3
2	4
3	5
4	6
5	7
6	8
7	9
8	10
9	12
10	13
11	15
12	16
13	18
14	21
15	22
16	24
17	25
18	28
19	30
20	32
21	33
22	36
23	37
24	40
25	42
26	43
27	45
28	46
29	48
30	50
31	52
32	54
33	56
34	57
35	58
36	60
37	61
38	66
39	67
40	68
41	70
42	72
43	73
44	75
45	76
46	78
47	80
48	81
49	82
50	84
51	85
52	86
53	88
54	91
55	92
56	93
57	94
58	96
59	97
60	100

n	a(n)
1	3
2	4
3	5
4	6
5	7
6	8
7	9
8	10
9	12
10	13
11	15
12	16
13	18
14	21
15	22
16	24
17	25
18	28
19	30
20	32
21	33
22	36
23	37
24	40
25	42
26	43
27	45
28	46
29	48
30	50
31	52
32	54
33	56
34	57
35	58
36	60
37	61
38	66
39	67
40	68
41	70
42	72
43	73
44	75
45	76
46	78
47	80
48	81
49	82
50	84
51	85
52	86
53	88
54	91
55	92
56	93
57	94
58	96
59	97
60	100

n	a(n)
1	3
2	4
3	5
4	6
5	7
6	8
7	9
8	10
9	12
10	13
11	15
12	16
13	18
14	21
15	22
16	24
17	25
18	28
19	30
20	32
21	33
22	36
23	37
24	40
25	42
26	43
27	45
28	46
29	48
30	50
31	52
32	54
33	56
34	57
35	58
36	60
37	61
38	66
39	67
40	68
41	70
42	72
43	73
44	75
45	76
46	78
47	80
48	81
49	82
50	84
51	85
52	86
53	88
54	91
55	92
56	93
57	94
58	96
59	97
60	100