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 | 1 |
| 1 | 14 |
| 2 | 163 |
| 3 | 1820 |
| 4 | 20101 |
| 5 | 221354 |
| 6 | 2435623 |
| 7 | 26794040 |
| 8 | 294741001 |
| 9 | 3242170694 |
| 10 | 35663936683 |
| 11 | 392303480660 |
| 12 | 4315338818701 |
| 13 | 47468728600034 |
| 14 | 522156019383343 |
| 15 | 5743716227565680 |
| 16 | 63180878546269201 |
| 17 | 694989664138101374 |
| 18 | 7644886305906535603 |
| 19 | 84093749366134153100 |
| 20 | 925031243030962468501 |