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 | 1 |
| 2 | 16 |
| 3 | 74 |
| 4 | 154 |
| 5 | 628 |
| 6 | 1470 |
| 7 | 5530 |
| 8 | 13906 |
| 9 | 49150 |
| 10 | 130108 |
| 11 | 439834 |
| 12 | 1208138 |
| 13 | 3956136 |
| 14 | 11159566 |
| 15 | 35718398 |
| 16 | 102702256 |
| 17 | 323381538 |
| 18 | 942724706 |
| 19 | 2933702600 |
| 20 | 8637532046 |
| 21 | 26653534886 |
| 22 | 79035941608 |
| 23 | 242412919890 |
| 24 | 722524675274 |
| 25 | 2206433888880 |