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 | 25 |
| 2 | 55 |
| 3 | 208 |
| 4 | 382 |
| 5 | 1273 |
| 6 | 2287 |
| 7 | 7480 |
| 8 | 13390 |
| 9 | 43657 |
| 10 | 78103 |
| 11 | 254512 |
| 12 | 455278 |
| 13 | 1483465 |
| 14 | 2653615 |
| 15 | 8646328 |
| 16 | 15466462 |
| 17 | 50394553 |
| 18 | 90145207 |
| 19 | 293721040 |
| 20 | 525404830 |
| 21 | 1711931737 |
| 22 | 3062283823 |
| 23 | 9977869432 |
| 24 | 17848298158 |
| 25 | 58155284905 |
| 26 | 104027505175 |
| 27 | 338953840048 |
| 28 | 606316732942 |