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 | 1 |
| 3 | 2 |
| 4 | 8 |
| 5 | 32 |
| 6 | 178 |
| 7 | 944 |
| 8 | 6255 |
| 9 | 39366 |
| 10 | 293652 |
| 11 | 2090576 |
| 12 | 17085798 |
| 13 | 134136792 |
| 14 | 1182991528 |
| 15 | 10085875720 |
| 16 | 95087538324 |
| 17 | 871536657504 |
| 18 | 8727880568468 |
| 19 | 85385942061016 |
| 20 | 904071273001352 |
| 21 | 9389429908430784 |
| 22 | 104728235042891360 |
| 23 | 1149676904405092704 |
| 24 | 13467595558130095308 |
| 25 | 155705728677310569008 |