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.
| n | a(n) |
|---|---|
| 1 | 156 |
| 2 | 656 |
| 3 | 756 |
| 4 | 776 |
| 5 | 780 |
| 6 | 3156 |
| 7 | 3256 |
| 8 | 3276 |
| 9 | 3280 |
| 10 | 3756 |
| 11 | 3776 |
| 12 | 3780 |
| 13 | 3876 |
| 14 | 3880 |
| 15 | 3900 |
| 16 | 15656 |
| 17 | 15756 |
| 18 | 15776 |
| 19 | 15780 |
| 20 | 16256 |
| 21 | 16276 |
| 22 | 16280 |
| 23 | 16376 |
| 24 | 16380 |
| 25 | 16400 |
| 26 | 18756 |
| 27 | 18776 |
| 28 | 18780 |
| 29 | 18876 |
| 30 | 18880 |
| 31 | 18900 |
| 32 | 19376 |
| 33 | 19380 |
| 34 | 19400 |
| 35 | 19500 |
| 36 | 78156 |
| 37 | 78256 |
| 38 | 78276 |
| 39 | 78280 |
| 40 | 78756 |
| 41 | 78776 |
| 42 | 78780 |