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) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 3 |
| 3 | 5 |
| 4 | 11 |
| 5 | 34 |
| 6 | 142 |
| 7 | 753 |
| 8 | 4826 |
| 9 | 36028 |
| 10 | 305133 |
| 11 | 2879841 |
| 12 | 29909422 |
| 13 | 338479430 |
| 14 | 4139716659 |
| 15 | 54339861531 |
| 16 | 761150445735 |
| 17 | 11322139144240 |
| 18 | 178116143657890 |
| 19 | 2952831190016239 |
| 20 | 51423702126549167 |
| 21 | 938126972940647198 |
| 22 | 17883424301972473340 |
| 23 | 355435808475002747565 |
| 24 | 7350551776003412371185 |