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 | 3 |
| 2 | 12 |
| 3 | 42 |
| 4 | 125 |
| 5 | 608 |
| 6 | 2427 |
| 7 | 10081 |
| 8 | 43568 |
| 9 | 197823 |
| 10 | 873432 |
| 11 | 3978580 |
| 12 | 18159630 |
| 13 | 83753054 |
| 14 | 387670103 |
| 15 | 1811802273 |
| 16 | 8451565541 |
| 17 | 39790817677 |