A026443 - cp's OEIS frontend

A026443 a(n) = least positive integer > a(n-1) and not a(i)*a(j)+2 for 1<=i with initial terms 1,2.

n	a(n)
1	1
2	2
3	3
4	6
5	7
6	10
7	11
8	15
9	18
10	19
11	25
12	26
13	29
14	30
15	33
16	34
17	37
18	41
19	42
20	45
21	46
22	49
23	50
24	53
25	57
26	58
27	61
28	64
29	65
30	69
31	73
32	74
33	78
34	81
35	82
36	85
37	88
38	91
39	95
40	96
41	99
42	103
43	106
44	109
45	114
46	115
47	119
48	120
49	123
50	126
51	127
52	131
53	134
54	138
55	139
56	142
57	143

[1, 2, 3, 6, 7, 10, 11, 15, 18, 19, 25, 26, 29, 30, 33, 34, 37, 41, 42, 45, 46, 49, 50, 53, 57, 58, 61, 64, 65, 69, 73, 74, 78, 81, 82, 85, 88, 91, 95, 96, 99, 103, 106, 109, 114, 115, 119, 120, 123, 126, 127, 131, 134, 138, 139, 142, 143]

cp's OEIS Frontend

A026443 a(n) = least positive integer > a(n-1) and not a(i)*a(j)+2 for 1<=i with initial terms 1,2.

Table of values

List of values

n	a(n)
1	1
2	2
3	3
4	6
5	7
6	10
7	11
8	15
9	18
10	19
11	25
12	26
13	29
14	30
15	33
16	34
17	37
18	41
19	42
20	45
21	46
22	49
23	50
24	53
25	57
26	58
27	61
28	64
29	65
30	69
31	73
32	74
33	78
34	81
35	82
36	85
37	88
38	91
39	95
40	96
41	99
42	103
43	106
44	109
45	114
46	115
47	119
48	120
49	123
50	126
51	127
52	131
53	134
54	138
55	139
56	142
57	143

n	a(n)
1	1
2	2
3	3
4	6
5	7
6	10
7	11
8	15
9	18
10	19
11	25
12	26
13	29
14	30
15	33
16	34
17	37
18	41
19	42
20	45
21	46
22	49
23	50
24	53
25	57
26	58
27	61
28	64
29	65
30	69
31	73
32	74
33	78
34	81
35	82
36	85
37	88
38	91
39	95
40	96
41	99
42	103
43	106
44	109
45	114
46	115
47	119
48	120
49	123
50	126
51	127
52	131
53	134
54	138
55	139
56	142
57	143

n	a(n)
1	1
2	2
3	3
4	6
5	7
6	10
7	11
8	15
9	18
10	19
11	25
12	26
13	29
14	30
15	33
16	34
17	37
18	41
19	42
20	45
21	46
22	49
23	50
24	53
25	57
26	58
27	61
28	64
29	65
30	69
31	73
32	74
33	78
34	81
35	82
36	85
37	88
38	91
39	95
40	96
41	99
42	103
43	106
44	109
45	114
46	115
47	119
48	120
49	123
50	126
51	127
52	131
53	134
54	138
55	139
56	142
57	143