A026451 - cp's OEIS frontend

A026451 a(n) = least positive integer > a(n-1) and not a(i)*a(j)+2 for i<=1<=j<=n, n >= 2.

n	a(n)
1	2
2	4
3	5
4	7
5	8
6	9
7	11
8	13
9	14
10	15
11	17
12	19
13	21
14	23
15	25
16	26
17	29
18	31
19	33
20	35
21	39
22	41
23	43
24	45
25	49
26	50
27	53
28	55
29	56
30	59
31	61
32	63
33	69
34	71
35	73
36	75
37	76
38	81
39	82
40	85
41	89
42	91
43	95
44	96
45	98
46	99
47	103
48	104
49	105
50	109
51	110
52	111
53	113
54	115
55	116
56	125
57	129
58	130

[2, 4, 5, 7, 8, 9, 11, 13, 14, 15, 17, 19, 21, 23, 25, 26, 29, 31, 33, 35, 39, 41, 43, 45, 49, 50, 53, 55, 56, 59, 61, 63, 69, 71, 73, 75, 76, 81, 82, 85, 89, 91, 95, 96, 98, 99, 103, 104, 105, 109, 110, 111, 113, 115, 116, 125, 129, 130]

cp's OEIS Frontend

A026451 a(n) = least positive integer > a(n-1) and not a(i)*a(j)+2 for i<=1<=j<=n, n >= 2.

Table of values

List of values

n	a(n)
1	2
2	4
3	5
4	7
5	8
6	9
7	11
8	13
9	14
10	15
11	17
12	19
13	21
14	23
15	25
16	26
17	29
18	31
19	33
20	35
21	39
22	41
23	43
24	45
25	49
26	50
27	53
28	55
29	56
30	59
31	61
32	63
33	69
34	71
35	73
36	75
37	76
38	81
39	82
40	85
41	89
42	91
43	95
44	96
45	98
46	99
47	103
48	104
49	105
50	109
51	110
52	111
53	113
54	115
55	116
56	125
57	129
58	130

n	a(n)
1	2
2	4
3	5
4	7
5	8
6	9
7	11
8	13
9	14
10	15
11	17
12	19
13	21
14	23
15	25
16	26
17	29
18	31
19	33
20	35
21	39
22	41
23	43
24	45
25	49
26	50
27	53
28	55
29	56
30	59
31	61
32	63
33	69
34	71
35	73
36	75
37	76
38	81
39	82
40	85
41	89
42	91
43	95
44	96
45	98
46	99
47	103
48	104
49	105
50	109
51	110
52	111
53	113
54	115
55	116
56	125
57	129
58	130

n	a(n)
1	2
2	4
3	5
4	7
5	8
6	9
7	11
8	13
9	14
10	15
11	17
12	19
13	21
14	23
15	25
16	26
17	29
18	31
19	33
20	35
21	39
22	41
23	43
24	45
25	49
26	50
27	53
28	55
29	56
30	59
31	61
32	63
33	69
34	71
35	73
36	75
37	76
38	81
39	82
40	85
41	89
42	91
43	95
44	96
45	98
46	99
47	103
48	104
49	105
50	109
51	110
52	111
53	113
54	115
55	116
56	125
57	129
58	130