A026445 - cp's OEIS frontend

A026445 a(n) = least positive integer > a(n-1) and not a(i)*a(j)+2 for 1<=i with initial terms 2,3.

n	a(n)
1	2
2	3
3	4
4	5
5	6
6	7
7	9
8	11
9	13
10	15
11	18
12	19
13	21
14	25
15	27
16	31
17	33
18	34
19	36
20	39
21	42
22	43
23	45
24	48
25	49
26	50
27	51
28	53
29	55
30	58
31	60
32	61
33	63
34	66
35	69
36	71
37	72
38	73
39	75
40	76
41	81
42	82
43	84
44	85
45	87
46	89
47	90
48	91
49	94
50	96
51	99
52	103
53	105
54	106
55	109
56	111
57	113
58	114
59	115
60	117

[2, 3, 4, 5, 6, 7, 9, 11, 13, 15, 18, 19, 21, 25, 27, 31, 33, 34, 36, 39, 42, 43, 45, 48, 49, 50, 51, 53, 55, 58, 60, 61, 63, 66, 69, 71, 72, 73, 75, 76, 81, 82, 84, 85, 87, 89, 90, 91, 94, 96, 99, 103, 105, 106, 109, 111, 113, 114, 115, 117]

cp's OEIS Frontend

A026445 a(n) = least positive integer > a(n-1) and not a(i)*a(j)+2 for 1<=i with initial terms 2,3.

Table of values

List of values

n	a(n)
1	2
2	3
3	4
4	5
5	6
6	7
7	9
8	11
9	13
10	15
11	18
12	19
13	21
14	25
15	27
16	31
17	33
18	34
19	36
20	39
21	42
22	43
23	45
24	48
25	49
26	50
27	51
28	53
29	55
30	58
31	60
32	61
33	63
34	66
35	69
36	71
37	72
38	73
39	75
40	76
41	81
42	82
43	84
44	85
45	87
46	89
47	90
48	91
49	94
50	96
51	99
52	103
53	105
54	106
55	109
56	111
57	113
58	114
59	115
60	117

n	a(n)
1	2
2	3
3	4
4	5
5	6
6	7
7	9
8	11
9	13
10	15
11	18
12	19
13	21
14	25
15	27
16	31
17	33
18	34
19	36
20	39
21	42
22	43
23	45
24	48
25	49
26	50
27	51
28	53
29	55
30	58
31	60
32	61
33	63
34	66
35	69
36	71
37	72
38	73
39	75
40	76
41	81
42	82
43	84
44	85
45	87
46	89
47	90
48	91
49	94
50	96
51	99
52	103
53	105
54	106
55	109
56	111
57	113
58	114
59	115
60	117

n	a(n)
1	2
2	3
3	4
4	5
5	6
6	7
7	9
8	11
9	13
10	15
11	18
12	19
13	21
14	25
15	27
16	31
17	33
18	34
19	36
20	39
21	42
22	43
23	45
24	48
25	49
26	50
27	51
28	53
29	55
30	58
31	60
32	61
33	63
34	66
35	69
36	71
37	72
38	73
39	75
40	76
41	81
42	82
43	84
44	85
45	87
46	89
47	90
48	91
49	94
50	96
51	99
52	103
53	105
54	106
55	109
56	111
57	113
58	114
59	115
60	117