A259444 - cp's OEIS frontend

A259444 a(1)=2. For n>1, a(n) = smallest number > a(n-1) which is different from all the numbers a(i)^a(j) for 1 <= i < n, 1 <= j < n.

n	a(n)
1	2
2	3
3	5
4	6
5	7
6	10
7	11
8	12
9	13
10	14
11	15
12	16
13	17
14	18
15	19
16	20
17	21
18	22
19	23
20	24
21	26
22	28
23	29
24	30
25	31
26	33
27	34
28	35
29	37
30	38
31	39
32	40
33	41
34	42
35	43
36	44
37	45
38	46
39	47
40	48
41	50
42	51
43	52
44	53
45	54
46	55
47	56
48	57
49	58
50	59
51	60
52	61
53	62
54	63
55	65
56	66
57	67
58	68
59	69
60	70
61	71
62	72
63	73
64	74
65	75
66	76

[2, 3, 5, 6, 7, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 26, 28, 29, 30, 31, 33, 34, 35, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76]

cp's OEIS Frontend

A259444 a(1)=2. For n>1, a(n) = smallest number > a(n-1) which is different from all the numbers a(i)^a(j) for 1 <= i < n, 1 <= j < n.

Table of values

List of values

n	a(n)
1	2
2	3
3	5
4	6
5	7
6	10
7	11
8	12
9	13
10	14
11	15
12	16
13	17
14	18
15	19
16	20
17	21
18	22
19	23
20	24
21	26
22	28
23	29
24	30
25	31
26	33
27	34
28	35
29	37
30	38
31	39
32	40
33	41
34	42
35	43
36	44
37	45
38	46
39	47
40	48
41	50
42	51
43	52
44	53
45	54
46	55
47	56
48	57
49	58
50	59
51	60
52	61
53	62
54	63
55	65
56	66
57	67
58	68
59	69
60	70
61	71
62	72
63	73
64	74
65	75
66	76

n	a(n)
1	2
2	3
3	5
4	6
5	7
6	10
7	11
8	12
9	13
10	14
11	15
12	16
13	17
14	18
15	19
16	20
17	21
18	22
19	23
20	24
21	26
22	28
23	29
24	30
25	31
26	33
27	34
28	35
29	37
30	38
31	39
32	40
33	41
34	42
35	43
36	44
37	45
38	46
39	47
40	48
41	50
42	51
43	52
44	53
45	54
46	55
47	56
48	57
49	58
50	59
51	60
52	61
53	62
54	63
55	65
56	66
57	67
58	68
59	69
60	70
61	71
62	72
63	73
64	74
65	75
66	76

n	a(n)
1	2
2	3
3	5
4	6
5	7
6	10
7	11
8	12
9	13
10	14
11	15
12	16
13	17
14	18
15	19
16	20
17	21
18	22
19	23
20	24
21	26
22	28
23	29
24	30
25	31
26	33
27	34
28	35
29	37
30	38
31	39
32	40
33	41
34	42
35	43
36	44
37	45
38	46
39	47
40	48
41	50
42	51
43	52
44	53
45	54
46	55
47	56
48	57
49	58
50	59
51	60
52	61
53	62
54	63
55	65
56	66
57	67
58	68
59	69
60	70
61	71
62	72
63	73
64	74
65	75
66	76