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 | 6 |
| 2 | 50 |
| 3 | 337 |
| 4 | 1922 |
| 5 | 9783 |
| 6 | 45537 |
| 7 | 198252 |
| 8 | 817482 |
| 9 | 3229096 |
| 10 | 12308970 |
| 11 | 45575437 |
| 12 | 164673074 |
| 13 | 582981253 |
| 14 | 2028408899 |
| 15 | 6954637113 |
| 16 | 23545924195 |
| 17 | 78860147938 |
| 18 | 261655333573 |
| 19 | 861137618468 |
| 20 | 2814055941811 |
| 21 | 9138890924393 |
| 22 | 29517256515379 |