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 | 4 |
| 2 | 14 |
| 3 | 40 |
| 4 | 105 |
| 5 | 252 |
| 6 | 574 |
| 7 | 1240 |
| 8 | 2580 |
| 9 | 5180 |
| 10 | 10108 |
| 11 | 19208 |
| 12 | 35693 |
| 13 | 64960 |
| 14 | 116090 |
| 15 | 203984 |
| 16 | 353017 |
| 17 | 602348 |
| 18 | 1014580 |
| 19 | 1688400 |
| 20 | 2778517 |
| 21 | 4524760 |
| 22 | 7296752 |
| 23 | 11658920 |
| 24 | 18468245 |
| 25 | 29015700 |
| 26 | 45235414 |
| 27 | 70005376 |
| 28 | 107585845 |
| 29 | 164245380 |
| 30 | 249162620 |
| 31 | 375704920 |
| 32 | 563251038 |