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 | 5 |
| 5 | 12 |
| 6 | 35 |
| 7 | 101 |
| 8 | 320 |
| 9 | 960 |
| 10 | 2701 |
| 11 | 6164 |
| 12 | 19770 |
| 13 | 34918 |
| 14 | 94023 |
| 15 | 232714 |
| 16 | 462463 |
| 17 | 770010 |
| 18 | 2462890 |
| 19 | 3247171 |
| 20 | 9756012 |
| 21 | 18463420 |
| 22 | 32963374 |
| 23 | 51599559 |
| 24 | 177923609 |
| 25 | 236127160 |