A202266 - cp's OEIS frontend

A202266 Composite numbers in which all substrings and reversal substrings are composites.

n	a(n)
1	4
2	6
3	8
4	9
5	44
6	46
7	48
8	49
9	64
10	66
11	68
12	69
13	84
14	86
15	88
16	94
17	96
18	99
19	444
20	446
21	448
22	464
23	466
24	468
25	469
26	484
27	486
28	488
29	494
30	496
31	644
32	646
33	648
34	649
35	664
36	666
37	668
38	669
39	684
40	686
41	688
42	694
43	696
44	699
45	844
46	846
47	848
48	849
49	864
50	866
51	868
52	869
53	884
54	886
55	888
56	946
57	948

[4, 6, 8, 9, 44, 46, 48, 49, 64, 66, 68, 69, 84, 86, 88, 94, 96, 99, 444, 446, 448, 464, 466, 468, 469, 484, 486, 488, 494, 496, 644, 646, 648, 649, 664, 666, 668, 669, 684, 686, 688, 694, 696, 699, 844, 846, 848, 849, 864, 866, 868, 869, 884, 886, 888, 946, 948]

cp's OEIS Frontend

A202266 Composite numbers in which all substrings and reversal substrings are composites.

Table of values

List of values

n	a(n)
1	4
2	6
3	8
4	9
5	44
6	46
7	48
8	49
9	64
10	66
11	68
12	69
13	84
14	86
15	88
16	94
17	96
18	99
19	444
20	446
21	448
22	464
23	466
24	468
25	469
26	484
27	486
28	488
29	494
30	496
31	644
32	646
33	648
34	649
35	664
36	666
37	668
38	669
39	684
40	686
41	688
42	694
43	696
44	699
45	844
46	846
47	848
48	849
49	864
50	866
51	868
52	869
53	884
54	886
55	888
56	946
57	948

n	a(n)
1	4
2	6
3	8
4	9
5	44
6	46
7	48
8	49
9	64
10	66
11	68
12	69
13	84
14	86
15	88
16	94
17	96
18	99
19	444
20	446
21	448
22	464
23	466
24	468
25	469
26	484
27	486
28	488
29	494
30	496
31	644
32	646
33	648
34	649
35	664
36	666
37	668
38	669
39	684
40	686
41	688
42	694
43	696
44	699
45	844
46	846
47	848
48	849
49	864
50	866
51	868
52	869
53	884
54	886
55	888
56	946
57	948

n	a(n)
1	4
2	6
3	8
4	9
5	44
6	46
7	48
8	49
9	64
10	66
11	68
12	69
13	84
14	86
15	88
16	94
17	96
18	99
19	444
20	446
21	448
22	464
23	466
24	468
25	469
26	484
27	486
28	488
29	494
30	496
31	644
32	646
33	648
34	649
35	664
36	666
37	668
38	669
39	684
40	686
41	688
42	694
43	696
44	699
45	844
46	846
47	848
48	849
49	864
50	866
51	868
52	869
53	884
54	886
55	888
56	946
57	948