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 | 8 |
| 2 | 51 |
| 3 | 300 |
| 4 | 1695 |
| 5 | 9348 |
| 6 | 50729 |
| 7 | 272128 |
| 8 | 1447155 |
| 9 | 7643880 |
| 10 | 40156281 |
| 11 | 210019428 |
| 12 | 1094338401 |
| 13 | 5684293020 |
| 14 | 29446107975 |
| 15 | 152181330480 |
| 16 | 784880109315 |
| 17 | 4040712839880 |
| 18 | 20768844586025 |
| 19 | 106595697483700 |
| 20 | 546389531720445 |
| 21 | 2797395801163260 |
| 22 | 14306735857573995 |