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 | 0 |
| 1 | 1 |
| 2 | 129 |
| 3 | 3282 |
| 4 | 32770 |
| 5 | 195315 |
| 6 | 839811 |
| 7 | 2882404 |
| 8 | 8388612 |
| 9 | 21523365 |
| 10 | 50000005 |
| 11 | 107179446 |
| 12 | 214990854 |
| 13 | 407865367 |
| 14 | 737894535 |
| 15 | 1281445320 |
| 16 | 2147483656 |
| 17 | 3487878729 |
| 18 | 5509980297 |
| 19 | 8491781530 |
| 20 | 12800000010 |
| 21 | 18911429691 |
| 22 | 27437936779 |
| 23 | 39155492652 |
| 24 | 55037657100 |
| 25 | 76293945325 |