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 | 2 |
| 2 | 14 |
| 3 | 74 |
| 4 | 286 |
| 5 | 1157 |
| 6 | 4778 |
| 7 | 19623 |
| 8 | 80478 |
| 9 | 330293 |
| 10 | 1355629 |
| 11 | 5563527 |
| 12 | 22832914 |
| 13 | 93707772 |
| 14 | 384582275 |
| 15 | 1578347684 |
| 16 | 6477630782 |
| 17 | 26584574434 |
| 18 | 109104640685 |
| 19 | 447771795953 |
| 20 | 1837681518261 |
| 21 | 7541951930181 |
| 22 | 30952609765223 |
| 23 | 127031312347552 |
| 24 | 521343900861138 |