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 | 6 |
| 2 | 27 |
| 3 | 98 |
| 4 | 315 |
| 5 | 924 |
| 6 | 2534 |
| 7 | 6588 |
| 8 | 16407 |
| 9 | 39430 |
| 10 | 91959 |
| 11 | 209034 |
| 12 | 464723 |
| 13 | 1013292 |
| 14 | 2171850 |
| 15 | 4584620 |
| 16 | 9546570 |
| 17 | 19635840 |
| 18 | 39940460 |
| 19 | 80421600 |
| 20 | 160437690 |
| 21 | 317354740 |
| 22 | 622844730 |
| 23 | 1213580820 |
| 24 | 2348773525 |
| 25 | 4517541378 |
| 26 | 8638447293 |
| 27 | 16428864606 |
| 28 | 31086197469 |
| 29 | 58539877020 |