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 | 14 |
| 1 | 70 |
| 2 | 300 |
| 3 | 1225 |
| 4 | 4900 |
| 5 | 19404 |
| 6 | 76440 |
| 7 | 300300 |
| 8 | 1178100 |
| 9 | 4618900 |
| 10 | 18106088 |
| 11 | 70984095 |
| 12 | 278369000 |
| 13 | 1092063000 |
| 14 | 4286142000 |
| 15 | 16830250920 |
| 16 | 66118842900 |
| 17 | 259878874500 |
| 18 | 1021939149000 |
| 19 | 4020523757250 |
| 20 | 15824781508536 |
| 21 | 62313700079400 |
| 22 | 245478212434000 |
| 23 | 967428110493000 |
| 24 | 3814113125277000 |