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 | 0 |
| 1 | 2 |
| 2 | 36 |
| 3 | 326 |
| 4 | 1992 |
| 5 | 9290 |
| 6 | 35436 |
| 7 | 115598 |
| 8 | 332688 |
| 9 | 864146 |
| 10 | 2060980 |
| 11 | 4573910 |
| 12 | 9545560 |
| 13 | 18892250 |
| 14 | 35704060 |
| 15 | 64797470 |
| 16 | 113461024 |
| 17 | 192441122 |
| 18 | 317222212 |
| 19 | 509663334 |
| 20 | 800061160 |
| 21 | 1229718378 |
| 22 | 1854105484 |
| 23 | 2746713774 |
| 24 | 4003707568 |