A026457 - cp's OEIS frontend

A026457 a(n) = least positive integer < a(n-1) and not a(i)*a(j)-2 for 1<=i

n	a(n)
1	2
2	4
3	5
4	7
5	9
6	10
7	11
8	13
9	14
10	15
11	17
12	19
13	21
14	22
15	23
16	25
17	27
18	29
19	30
20	31
21	35
22	37
23	39
24	41
25	45
26	46
27	47
28	49
29	51
30	55
31	57
32	59
33	62
34	64
35	65
36	67
37	69
38	70
39	71
40	77
41	78
42	79
43	81
44	84
45	85
46	87
47	91
48	94
49	95
50	99
51	101
52	102
53	104
54	105
55	107
56	109
57	110
58	111
59	119

[2, 4, 5, 7, 9, 10, 11, 13, 14, 15, 17, 19, 21, 22, 23, 25, 27, 29, 30, 31, 35, 37, 39, 41, 45, 46, 47, 49, 51, 55, 57, 59, 62, 64, 65, 67, 69, 70, 71, 77, 78, 79, 81, 84, 85, 87, 91, 94, 95, 99, 101, 102, 104, 105, 107, 109, 110, 111, 119]

cp's OEIS Frontend

A026457 a(n) = least positive integer < a(n-1) and not a(i)*a(j)-2 for 1<=i

Table of values

List of values

n	a(n)
1	2
2	4
3	5
4	7
5	9
6	10
7	11
8	13
9	14
10	15
11	17
12	19
13	21
14	22
15	23
16	25
17	27
18	29
19	30
20	31
21	35
22	37
23	39
24	41
25	45
26	46
27	47
28	49
29	51
30	55
31	57
32	59
33	62
34	64
35	65
36	67
37	69
38	70
39	71
40	77
41	78
42	79
43	81
44	84
45	85
46	87
47	91
48	94
49	95
50	99
51	101
52	102
53	104
54	105
55	107
56	109
57	110
58	111
59	119

n	a(n)
1	2
2	4
3	5
4	7
5	9
6	10
7	11
8	13
9	14
10	15
11	17
12	19
13	21
14	22
15	23
16	25
17	27
18	29
19	30
20	31
21	35
22	37
23	39
24	41
25	45
26	46
27	47
28	49
29	51
30	55
31	57
32	59
33	62
34	64
35	65
36	67
37	69
38	70
39	71
40	77
41	78
42	79
43	81
44	84
45	85
46	87
47	91
48	94
49	95
50	99
51	101
52	102
53	104
54	105
55	107
56	109
57	110
58	111
59	119

n	a(n)
1	2
2	4
3	5
4	7
5	9
6	10
7	11
8	13
9	14
10	15
11	17
12	19
13	21
14	22
15	23
16	25
17	27
18	29
19	30
20	31
21	35
22	37
23	39
24	41
25	45
26	46
27	47
28	49
29	51
30	55
31	57
32	59
33	62
34	64
35	65
36	67
37	69
38	70
39	71
40	77
41	78
42	79
43	81
44	84
45	85
46	87
47	91
48	94
49	95
50	99
51	101
52	102
53	104
54	105
55	107
56	109
57	110
58	111
59	119