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 | 22 |
| 3 | 295 |
| 4 | 3145 |
| 5 | 29503 |
| 6 | 256565 |
| 7 | 2134122 |
| 8 | 17337685 |
| 9 | 139635380 |
| 10 | 1127444190 |
| 11 | 9204978242 |
| 12 | 76496257502 |
| 13 | 650255333547 |
| 14 | 5673699543152 |
| 15 | 50929138898237 |
| 16 | 470895301126099 |
| 17 | 4486844907734841 |
| 18 | 44052656933795691 |
| 19 | 445462140383086124 |