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 | 1 |
| 2 | 1 |
| 3 | 16 |
| 4 | 47 |
| 5 | 397 |
| 6 | 1770 |
| 7 | 11658 |
| 8 | 59946 |
| 9 | 359962 |
| 10 | 1958968 |
| 11 | 11341696 |
| 12 | 63142224 |
| 13 | 360314940 |
| 14 | 2024278172 |
| 15 | 11485023624 |
| 16 | 64758162416 |
| 17 | 366573071464 |
| 18 | 2069908196378 |
| 19 | 11706322628832 |
| 20 | 66139560111600 |
| 21 | 373914808423830 |
| 22 | 2113066820134474 |
| 23 | 11944325099736622 |
| 24 | 67505931650135578 |