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 | 2 |
| 1 | 12 |
| 2 | 122 |
| 3 | 1332 |
| 4 | 14642 |
| 5 | 161052 |
| 6 | 1771562 |
| 7 | 19487172 |
| 8 | 214358882 |
| 9 | 2357947692 |
| 10 | 25937424602 |
| 11 | 285311670612 |
| 12 | 3138428376722 |
| 13 | 34522712143932 |
| 14 | 379749833583242 |
| 15 | 4177248169415652 |
| 16 | 45949729863572162 |
| 17 | 505447028499293772 |