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 | 31 |
| 2 | 961 |
| 3 | 2305 |
| 4 | 13067 |
| 5 | 52240 |
| 6 | 135686 |
| 7 | 467686 |
| 8 | 1233127 |
| 9 | 3284096 |
| 10 | 8655283 |
| 11 | 21076355 |
| 12 | 52058229 |
| 13 | 123345376 |
| 14 | 288255238 |
| 15 | 665907876 |
| 16 | 1506716940 |
| 17 | 3386544920 |
| 18 | 7505699199 |
| 19 | 16482389432 |
| 20 | 35903584588 |
| 21 | 77477997261 |
| 22 | 166138926351 |
| 23 | 353659351084 |