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 | 1 |
| 2 | 7 |
| 3 | 40 |
| 4 | 240 |
| 5 | 1448 |
| 6 | 8630 |
| 7 | 53545 |
| 8 | 371845 |
| 9 | 3267453 |
| 10 | 36428242 |
| 11 | 442762543 |
| 12 | 5217693527 |
| 13 | 57321559329 |
| 14 | 586532407659 |
| 15 | 5666269188709 |
| 16 | 52728701479194 |