A026444 - cp's OEIS frontend

A026444 a(n) = least positive integer > a(n-1) and not a(i)*a(j)+2 for 1<=i with initial terms 1,3.

n	a(n)
1	1
2	3
3	4
4	7
5	8
6	11
7	12
8	15
9	16
10	19
11	20
12	24
13	25
14	28
15	29
16	32
17	33
18	36
19	37
20	40
21	41
22	44
23	45
24	48
25	49
26	52
27	53
28	56
29	57
30	60
31	61
32	64
33	65
34	68
35	69
36	72
37	73
38	76
39	80
40	81
41	84
42	85
43	88
44	91
45	92
46	95
47	96
48	99
49	100
50	103
51	104
52	108
53	109
54	112
55	115
56	116
57	119
58	120
59	123

[1, 3, 4, 7, 8, 11, 12, 15, 16, 19, 20, 24, 25, 28, 29, 32, 33, 36, 37, 40, 41, 44, 45, 48, 49, 52, 53, 56, 57, 60, 61, 64, 65, 68, 69, 72, 73, 76, 80, 81, 84, 85, 88, 91, 92, 95, 96, 99, 100, 103, 104, 108, 109, 112, 115, 116, 119, 120, 123]

cp's OEIS Frontend

A026444 a(n) = least positive integer > a(n-1) and not a(i)*a(j)+2 for 1<=i with initial terms 1,3.

Table of values

List of values

n	a(n)
1	1
2	3
3	4
4	7
5	8
6	11
7	12
8	15
9	16
10	19
11	20
12	24
13	25
14	28
15	29
16	32
17	33
18	36
19	37
20	40
21	41
22	44
23	45
24	48
25	49
26	52
27	53
28	56
29	57
30	60
31	61
32	64
33	65
34	68
35	69
36	72
37	73
38	76
39	80
40	81
41	84
42	85
43	88
44	91
45	92
46	95
47	96
48	99
49	100
50	103
51	104
52	108
53	109
54	112
55	115
56	116
57	119
58	120
59	123

n	a(n)
1	1
2	3
3	4
4	7
5	8
6	11
7	12
8	15
9	16
10	19
11	20
12	24
13	25
14	28
15	29
16	32
17	33
18	36
19	37
20	40
21	41
22	44
23	45
24	48
25	49
26	52
27	53
28	56
29	57
30	60
31	61
32	64
33	65
34	68
35	69
36	72
37	73
38	76
39	80
40	81
41	84
42	85
43	88
44	91
45	92
46	95
47	96
48	99
49	100
50	103
51	104
52	108
53	109
54	112
55	115
56	116
57	119
58	120
59	123

n	a(n)
1	1
2	3
3	4
4	7
5	8
6	11
7	12
8	15
9	16
10	19
11	20
12	24
13	25
14	28
15	29
16	32
17	33
18	36
19	37
20	40
21	41
22	44
23	45
24	48
25	49
26	52
27	53
28	56
29	57
30	60
31	61
32	64
33	65
34	68
35	69
36	72
37	73
38	76
39	80
40	81
41	84
42	85
43	88
44	91
45	92
46	95
47	96
48	99
49	100
50	103
51	104
52	108
53	109
54	112
55	115
56	116
57	119
58	120
59	123