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 | 0 |
| 2 | 30 |
| 3 | 425 |
| 4 | 3008 |
| 5 | 14572 |
| 6 | 55060 |
| 7 | 174130 |
| 8 | 481360 |
| 9 | 1197196 |
| 10 | 2733874 |
| 11 | 5817955 |
| 12 | 11668800 |
| 13 | 22250280 |
| 14 | 40616264 |
| 15 | 71373956 |
| 16 | 121292960 |
| 17 | 200092040 |
| 18 | 321439910 |
| 19 | 504211037 |
| 20 | 774042368 |
| 21 | 1165242100 |
| 22 | 1723107100 |
| 23 | 2506711350 |
| 24 | 3592233840 |