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 | 0 |
| 2 | 1 |
| 3 | 2 |
| 4 | 3 |
| 5 | 4 |
| 6 | 67 |
| 7 | 98 |
| 8 | 104 |
| 9 | 651 |
| 10 | 2293 |
| 11 | 3074 |
| 12 | 26691 |
| 13 | 27741 |
| 14 | 704396 |
| 15 | 723296 |
| 16 | 755846 |
| 17 | 883407 |
| 18 | 48616624 |
| 19 | 295979506 |
| 20 | 297379006 |
| 21 | 402327541 |
| 22 | 198522549056 |
| 23 | 204185363456 |
| 24 | 240971251611 |
| 25 | 246467321391 |
| 26 | 303520083621 |
| 27 | 330347455102 |