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 | 11 |
| 2 | 82 |
| 3 | 515 |
| 4 | 2934 |
| 5 | 15694 |
| 6 | 80324 |
| 7 | 397923 |
| 8 | 1922510 |
| 9 | 9105690 |
| 10 | 42438076 |
| 11 | 195165646 |
| 12 | 887516252 |
| 13 | 3997537980 |
| 14 | 17857602568 |
| 15 | 79200753059 |
| 16 | 349051186494 |
| 17 | 1529735010658 |
| 18 | 6670733733260 |
| 19 | 28959032959962 |
| 20 | 125209652884756 |
| 21 | 539384745200516 |
| 22 | 2315840230811832 |
| 23 | 9912689725127950 |