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 | 0 |
| 3 | 13 |
| 4 | 2792 |
| 5 | 27252 |
| 6 | 103108 |
| 7 | 246792 |
| 8 | 458018 |
| 9 | 732810 |
| 10 | 1069534 |
| 11 | 1468190 |
| 12 | 1928778 |
| 13 | 2451298 |
| 14 | 3035750 |
| 15 | 3682134 |
| 16 | 4390450 |
| 17 | 5160698 |
| 18 | 5992878 |
| 19 | 6886990 |
| 20 | 7843034 |
| 21 | 8861010 |
| 22 | 9940918 |
| 23 | 11082758 |
| 24 | 12286530 |
| 25 | 13552234 |
| 26 | 14879870 |
| 27 | 16269438 |
| 28 | 17720938 |
| 29 | 19234370 |