cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A254752 Composite numbers such that, in base 10, all their proper prefixes and suffixes represent composites.

Table of values

n a(n)
1 44
2 46
3 48
4 49
5 64
6 66
7 68
8 69
9 84
10 86
11 88
12 94
13 96
14 98
15 99
16 404
17 406
18 408
19 424
20 426
21 428
22 444
23 446
24 448
25 454
26 456
27 458
28 464
29 466
30 468
31 469
32 484
33 486
34 488
35 494
36 496
37 498
38 604
39 606
40 608
41 609
42 624
43 626
44 628
45 634
46 636
47 638
48 639
49 644
50 646
51 648
52 649
53 654
54 656
55 658
56 664
57 666
58 668
59 669
60 684
61 686
62 688
63 694
64 696
65 698
66 699
67 804
68 806
69 808
70 814
71 816
72 818
73 824
74 826
75 828

List of values

[44, 46, 48, 49, 64, 66, 68, 69, 84, 86, 88, 94, 96, 98, 99, 404, 406, 408, 424, 426, 428, 444, 446, 448, 454, 456, 458, 464, 466, 468, 469, 484, 486, 488, 494, 496, 498, 604, 606, 608, 609, 624, 626, 628, 634, 636, 638, 639, 644, 646, 648, 649, 654, 656, 658, 664, 666, 668, 669, 684, 686, 688, 694, 696, 698, 699, 804, 806, 808, 814, 816, 818, 824, 826, 828]