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 | 11 |
| 3 | 18 |
| 4 | 75 |
| 5 | 172 |
| 6 | 372 |
| 7 | 482 |
| 8 | 732 |
| 9 | 3276 |
| 10 | 7965 |
| 11 | 13068 |
| 12 | 46476 |
| 13 | 103488 |
| 14 | 252240 |
| 15 | 727956 |
| 16 | 1795605 |
| 17 | 6030528 |
| 18 | 8769600 |
| 19 | 15436092 |
| 20 | 56747712 |
| 21 | 224518995 |
| 22 | 297780084 |
| 23 | 317961000 |
| 24 | 855489144 |
| 25 | 2691137721 |
| 26 | 58016937600 |
| 27 | 127198874880 |
| 28 | 228517311456 |
| 29 | 411814778112 |