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 | 0 |
| 2 | 13 |
| 3 | 7 |
| 4 | 76 |
| 5 | 520 |
| 6 | 2767 |
| 7 | 11202 |
| 8 | 66148 |
| 9 | 385999 |
| 10 | 2040394 |
| 11 | 11280309 |
| 12 | 63669582 |
| 13 | 352938921 |
| 14 | 1954934444 |
| 15 | 10928716512 |
| 16 | 60920261087 |
| 17 | 339016489892 |
| 18 | 1890631777955 |
| 19 | 10543750377805 |
| 20 | 58766637746893 |
| 21 | 327645644514925 |
| 22 | 1827099377713191 |