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 | 3 |
| 2 | 29 |
| 3 | 75 |
| 4 | 432 |
| 5 | 998 |
| 6 | 3624 |
| 7 | 8310 |
| 8 | 44717 |
| 9 | 102443 |
| 10 | 370269 |
| 11 | 848195 |
| 12 | 4561352 |
| 13 | 10448838 |
| 14 | 37764464 |
| 15 | 86508230 |
| 16 | 465213837 |
| 17 | 1065679683 |
| 18 | 3851605709 |
| 19 | 8822991915 |
| 20 | 47447250672 |
| 21 | 108688879478 |
| 22 | 392826018504 |
| 23 | 899858667750 |
| 24 | 4839154355357 |
| 25 | 11085200027723 |
| 26 | 40064402282349 |