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 | 8 |
| 2 | 44 |
| 3 | 212 |
| 4 | 1156 |
| 5 | 6428 |
| 6 | 36338 |
| 7 | 206942 |
| 8 | 1183164 |
| 9 | 6777860 |
| 10 | 38866134 |
| 11 | 222980282 |
| 12 | 1279588414 |
| 13 | 7343932838 |
| 14 | 42151639560 |
| 15 | 241943513252 |
| 16 | 1388738207756 |
| 17 | 7971319975484 |
| 18 | 45755345035400 |
| 19 | 262636025020328 |
| 20 | 1507534275820126 |