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 | 2 |
| 2 | 2 |
| 3 | 11 |
| 4 | 14 |
| 5 | 47 |
| 6 | 305 |
| 7 | 611 |
| 8 | 2070 |
| 9 | 8831 |
| 10 | 84077 |
| 11 | 204371 |
| 12 | 944333 |
| 13 | 3850407 |
| 14 | 23991739 |
| 15 | 297448526 |
| 16 | 927586630 |
| 17 | 4775902567 |
| 18 | 24534836837 |
| 19 | 141681919871 |
| 20 | 1080484165089 |
| 21 | 18553632475991 |
| 22 | 66762080435239 |
| 23 | 415657332495526 |
| 24 | 2298883231736949 |
| 25 | 15799818116227747 |