A026446 - cp's OEIS frontend

A026446 a(n) = least positive integer > a(n-1) and not a(i)*a(j)+2 for 1<=i with initial terms 2,4.

n	a(n)
1	2
2	4
3	5
4	6
5	7
6	8
7	9
8	11
9	13
10	15
11	17
12	19
13	21
14	23
15	25
16	27
17	29
18	31
19	33
20	35
21	39
22	41
23	43
24	45
25	49
26	51
27	53
28	55
29	59
30	61
31	63
32	66
33	69
34	71
35	73
36	75
37	76
38	81
39	82
40	83
41	85
42	89
43	91
44	95
45	96
46	98
47	99
48	103
49	105
50	109
51	111
52	113
53	114
54	115
55	123
56	125
57	129
58	130
59	131

[2, 4, 5, 6, 7, 8, 9, 11, 13, 15, 17, 19, 21, 23, 25, 27, 29, 31, 33, 35, 39, 41, 43, 45, 49, 51, 53, 55, 59, 61, 63, 66, 69, 71, 73, 75, 76, 81, 82, 83, 85, 89, 91, 95, 96, 98, 99, 103, 105, 109, 111, 113, 114, 115, 123, 125, 129, 130, 131]

cp's OEIS Frontend

A026446 a(n) = least positive integer > a(n-1) and not a(i)*a(j)+2 for 1<=i with initial terms 2,4.

Table of values

List of values

n	a(n)
1	2
2	4
3	5
4	6
5	7
6	8
7	9
8	11
9	13
10	15
11	17
12	19
13	21
14	23
15	25
16	27
17	29
18	31
19	33
20	35
21	39
22	41
23	43
24	45
25	49
26	51
27	53
28	55
29	59
30	61
31	63
32	66
33	69
34	71
35	73
36	75
37	76
38	81
39	82
40	83
41	85
42	89
43	91
44	95
45	96
46	98
47	99
48	103
49	105
50	109
51	111
52	113
53	114
54	115
55	123
56	125
57	129
58	130
59	131

n	a(n)
1	2
2	4
3	5
4	6
5	7
6	8
7	9
8	11
9	13
10	15
11	17
12	19
13	21
14	23
15	25
16	27
17	29
18	31
19	33
20	35
21	39
22	41
23	43
24	45
25	49
26	51
27	53
28	55
29	59
30	61
31	63
32	66
33	69
34	71
35	73
36	75
37	76
38	81
39	82
40	83
41	85
42	89
43	91
44	95
45	96
46	98
47	99
48	103
49	105
50	109
51	111
52	113
53	114
54	115
55	123
56	125
57	129
58	130
59	131

n	a(n)
1	2
2	4
3	5
4	6
5	7
6	8
7	9
8	11
9	13
10	15
11	17
12	19
13	21
14	23
15	25
16	27
17	29
18	31
19	33
20	35
21	39
22	41
23	43
24	45
25	49
26	51
27	53
28	55
29	59
30	61
31	63
32	66
33	69
34	71
35	73
36	75
37	76
38	81
39	82
40	83
41	85
42	89
43	91
44	95
45	96
46	98
47	99
48	103
49	105
50	109
51	111
52	113
53	114
54	115
55	123
56	125
57	129
58	130
59	131