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 | 548 |
| 2 | 31577 |
| 3 | 300304 |
| 4 | 2141609 |
| 5 | 7972932 |
| 6 | 26526337 |
| 7 | 67596992 |
| 8 | 161991665 |
| 9 | 335832580 |
| 10 | 669329801 |
| 11 | 1217929488 |
| 12 | 2155659097 |
| 13 | 3584230244 |
| 14 | 5837790449 |
| 15 | 9084731392 |
| 16 | 13912683617 |
| 17 | 20579766372 |
| 18 | 30053056825 |
| 19 | 42704873360 |
| 20 | 60046213001 |
| 21 | 82587911428 |