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 | 18 |
| 1 | 207 |
| 2 | 1198 |
| 3 | 4825 |
| 4 | 15448 |
| 5 | 42168 |
| 6 | 102297 |
| 7 | 226530 |
| 8 | 466357 |
| 9 | 904352 |
| 10 | 1668083 |
| 11 | 2948502 |
| 12 | 5023797 |
| 13 | 8289819 |
| 14 | 13298336 |
| 15 | 20804513 |
| 16 | 31825172 |
| 17 | 47709549 |
| 18 | 70224436 |
| 19 | 101655775 |
| 20 | 144928958 |
| 21 | 203750282 |
| 22 | 282772211 |
| 23 | 387785308 |
| 24 | 525939919 |
| 25 | 706000918 |
| 26 | 938639057 |
| 27 | 1236762708 |
| 28 | 1615894035 |
| 29 | 2094593893 |