A121719 - cp's OEIS frontend

A121719 Strings of digits which are composite regardless of the base in which they are interpreted. Exclude bases in which numbers are not interpretable.

n	a(n)
1	4
2	6
3	8
4	9
5	20
6	22
7	24
8	26
9	28
10	30
11	33
12	36
13	39
14	40
15	42
16	44
17	46
18	48
19	50
20	55
21	60
22	62
23	63
24	64
25	66
26	68
27	69
28	70
29	77
30	80
31	82
32	84
33	86
34	88
35	90
36	93
37	96
38	99
39	100
40	110
41	112
42	114
43	116
44	118
45	120
46	121
47	130
48	132
49	134
50	136
51	138
52	140
53	143
54	144

[4, 6, 8, 9, 20, 22, 24, 26, 28, 30, 33, 36, 39, 40, 42, 44, 46, 48, 50, 55, 60, 62, 63, 64, 66, 68, 69, 70, 77, 80, 82, 84, 86, 88, 90, 93, 96, 99, 100, 110, 112, 114, 116, 118, 120, 121, 130, 132, 134, 136, 138, 140, 143, 144]

cp's OEIS Frontend

A121719 Strings of digits which are composite regardless of the base in which they are interpreted. Exclude bases in which numbers are not interpretable.

Table of values

List of values

n	a(n)
1	4
2	6
3	8
4	9
5	20
6	22
7	24
8	26
9	28
10	30
11	33
12	36
13	39
14	40
15	42
16	44
17	46
18	48
19	50
20	55
21	60
22	62
23	63
24	64
25	66
26	68
27	69
28	70
29	77
30	80
31	82
32	84
33	86
34	88
35	90
36	93
37	96
38	99
39	100
40	110
41	112
42	114
43	116
44	118
45	120
46	121
47	130
48	132
49	134
50	136
51	138
52	140
53	143
54	144

n	a(n)
1	4
2	6
3	8
4	9
5	20
6	22
7	24
8	26
9	28
10	30
11	33
12	36
13	39
14	40
15	42
16	44
17	46
18	48
19	50
20	55
21	60
22	62
23	63
24	64
25	66
26	68
27	69
28	70
29	77
30	80
31	82
32	84
33	86
34	88
35	90
36	93
37	96
38	99
39	100
40	110
41	112
42	114
43	116
44	118
45	120
46	121
47	130
48	132
49	134
50	136
51	138
52	140
53	143
54	144

n	a(n)
1	4
2	6
3	8
4	9
5	20
6	22
7	24
8	26
9	28
10	30
11	33
12	36
13	39
14	40
15	42
16	44
17	46
18	48
19	50
20	55
21	60
22	62
23	63
24	64
25	66
26	68
27	69
28	70
29	77
30	80
31	82
32	84
33	86
34	88
35	90
36	93
37	96
38	99
39	100
40	110
41	112
42	114
43	116
44	118
45	120
46	121
47	130
48	132
49	134
50	136
51	138
52	140
53	143
54	144