A026456 - cp's OEIS frontend

A026456 a(n) = least positive integer < a(n-1) and not a(i)*a(j)-2 for 1<=i

n	a(n)
1	1
2	4
3	5
4	6
5	7
6	8
7	9
8	10
9	11
10	12
11	13
12	14
13	15
14	16
15	17
16	19
17	20
18	21
19	23
20	24
21	25
22	27
23	29
24	31
25	32
26	35
27	36
28	37
29	39
30	41
31	44
32	45
33	47
34	49
35	51
36	55
37	56
38	57
39	59
40	60
41	65
42	67
43	69
44	71
45	72
46	77
47	79
48	80
49	81
50	84
51	85
52	87
53	91
54	92
55	95
56	99
57	101
58	104
59	105
60	107

[1, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 19, 20, 21, 23, 24, 25, 27, 29, 31, 32, 35, 36, 37, 39, 41, 44, 45, 47, 49, 51, 55, 56, 57, 59, 60, 65, 67, 69, 71, 72, 77, 79, 80, 81, 84, 85, 87, 91, 92, 95, 99, 101, 104, 105, 107]

cp's OEIS Frontend

A026456 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	1
2	4
3	5
4	6
5	7
6	8
7	9
8	10
9	11
10	12
11	13
12	14
13	15
14	16
15	17
16	19
17	20
18	21
19	23
20	24
21	25
22	27
23	29
24	31
25	32
26	35
27	36
28	37
29	39
30	41
31	44
32	45
33	47
34	49
35	51
36	55
37	56
38	57
39	59
40	60
41	65
42	67
43	69
44	71
45	72
46	77
47	79
48	80
49	81
50	84
51	85
52	87
53	91
54	92
55	95
56	99
57	101
58	104
59	105
60	107

n	a(n)
1	1
2	4
3	5
4	6
5	7
6	8
7	9
8	10
9	11
10	12
11	13
12	14
13	15
14	16
15	17
16	19
17	20
18	21
19	23
20	24
21	25
22	27
23	29
24	31
25	32
26	35
27	36
28	37
29	39
30	41
31	44
32	45
33	47
34	49
35	51
36	55
37	56
38	57
39	59
40	60
41	65
42	67
43	69
44	71
45	72
46	77
47	79
48	80
49	81
50	84
51	85
52	87
53	91
54	92
55	95
56	99
57	101
58	104
59	105
60	107

n	a(n)
1	1
2	4
3	5
4	6
5	7
6	8
7	9
8	10
9	11
10	12
11	13
12	14
13	15
14	16
15	17
16	19
17	20
18	21
19	23
20	24
21	25
22	27
23	29
24	31
25	32
26	35
27	36
28	37
29	39
30	41
31	44
32	45
33	47
34	49
35	51
36	55
37	56
38	57
39	59
40	60
41	65
42	67
43	69
44	71
45	72
46	77
47	79
48	80
49	81
50	84
51	85
52	87
53	91
54	92
55	95
56	99
57	101
58	104
59	105
60	107