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 | 0 |
| 1 | 1 |
| 2 | 258 |
| 3 | 7592 |
| 4 | 110310 |
| 5 | 1217374 |
| 6 | 12263090 |
| 7 | 123349746 |
| 8 | 1293790126 |
| 9 | 14422297646 |
| 10 | 172035525354 |
| 11 | 2198386222330 |
| 12 | 30052681253126 |
| 13 | 438421632024006 |
| 14 | 6806217982912546 |
| 15 | 112117997189378354 |
| 16 | 1954283594806071390 |
| 17 | 35949546988844228446 |
| 18 | 696172911589097791706 |