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 | 23 |
| 2 | 265 |
| 3 | 2047 |
| 4 | 11969 |
| 5 | 56695 |
| 6 | 227305 |
| 7 | 795455 |
| 8 | 2485825 |
| 9 | 7059735 |
| 10 | 18474633 |
| 11 | 45046719 |
| 12 | 103274625 |
| 13 | 224298231 |
| 14 | 464387817 |
| 15 | 921406335 |
| 16 | 1759885185 |
| 17 | 3248227095 |
| 18 | 5812626185 |
| 19 | 10113604735 |
| 20 | 17152640321 |
| 21 | 28418229623 |
| 22 | 46082942185 |
| 23 | 73265596607 |
| 24 | 114375683009 |