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 | 17 |
| 3 | 92 |
| 4 | 495 |
| 5 | 2475 |
| 6 | 11771 |
| 7 | 52226 |
| 8 | 212527 |
| 9 | 789228 |
| 10 | 2640323 |
| 11 | 7870055 |
| 12 | 20730606 |
| 13 | 47916748 |
| 14 | 96715832 |
| 15 | 170154214 |
| 16 | 260956703 |
| 17 | 349541944 |
| 18 | 410294786 |
| 19 | 423631649 |
| 20 | 385887175 |
| 21 | 310724581 |
| 22 | 221398196 |
| 23 | 139580751 |
| 24 | 77748102 |
| 25 | 38162987 |
| 26 | 16445627 |
| 27 | 6178002 |
| 28 | 2007607 |
| 29 | 559163 |
| 30 | 131269 |
| 31 | 25378 |
| 32 | 4012 |
| 33 | 481 |
| 34 | 36 |
| 35 | 4 |