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 | 541 |
| 2 | 761 |
| 3 | 1465 |
| 4 | 1781 |
| 5 | 3805 |
| 6 | 8249 |
| 7 | 10145 |
| 8 | 22069 |
| 9 | 48029 |
| 10 | 59089 |
| 11 | 128609 |
| 12 | 279925 |
| 13 | 344389 |
| 14 | 749585 |
| 15 | 1631521 |
| 16 | 2007245 |
| 17 | 4368901 |
| 18 | 9509201 |
| 19 | 11699081 |
| 20 | 25463821 |
| 21 | 55423685 |
| 22 | 68187241 |
| 23 | 148414025 |
| 24 | 323032909 |
| 25 | 397424365 |
| 26 | 865020329 |
| 27 | 1882773769 |