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 | 1 |
| 1 | 16 |
| 2 | 136 |
| 3 | 832 |
| 4 | 4132 |
| 5 | 17696 |
| 6 | 67712 |
| 7 | 236928 |
| 8 | 770442 |
| 9 | 2355824 |
| 10 | 6834240 |
| 11 | 18940480 |
| 12 | 50424536 |
| 13 | 129535968 |
| 14 | 322288128 |
| 15 | 779022208 |
| 16 | 1834203955 |
| 17 | 4216133616 |
| 18 | 9479688992 |
| 19 | 20884408704 |
| 20 | 45148577668 |
| 21 | 95902505120 |
| 22 | 200394848512 |
| 23 | 412350614016 |
| 24 | 836328261438 |
| 25 | 1673337795840 |
| 26 | 3305364030464 |
| 27 | 6450386567104 |
| 28 | 12443955363352 |
| 29 | 23745951691328 |
| 30 | 44844655553536 |
| 31 | 83856163515776 |
| 32 | 155331420821337 |