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 | 4 |
| 2 | 94 |
| 3 | 210 |
| 4 | 294 |
| 5 | 994 |
| 6 | 5880 |
| 7 | 9994 |
| 8 | 52888 |
| 9 | 99994 |
| 10 | 127044 |
| 11 | 414180 |
| 12 | 999994 |
| 13 | 8264470 |
| 14 | 9999994 |
| 15 | 12456750 |
| 16 | 41868508 |
| 17 | 99999994 |
| 18 | 112670544 |
| 19 | 441341880 |
| 20 | 468144040 |
| 21 | 669421494 |
| 22 | 702338994 |
| 23 | 715976338 |
| 24 | 750005718 |
| 25 | 960645294 |
| 26 | 999999994 |