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 | 3 |
| 2 | 4 |
| 3 | 11 |
| 4 | 38 |
| 5 | 136 |
| 6 | 512 |
| 7 | 1993 |
| 8 | 7958 |
| 9 | 32420 |
| 10 | 134216 |
| 11 | 563030 |
| 12 | 2388092 |
| 13 | 10224320 |
| 14 | 44127328 |
| 15 | 191783029 |
| 16 | 838623654 |
| 17 | 3686965308 |
| 18 | 16287624440 |
| 19 | 72262899994 |
| 20 | 321852273332 |
| 21 | 1438540956048 |
| 22 | 6450223722816 |
| 23 | 29006443606746 |
| 24 | 130790584554748 |
| 25 | 591191800834696 |