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 | 1 |
| 2 | 5 |
| 3 | 10 |
| 4 | 39 |
| 5 | 77 |
| 6 | 521 |
| 7 | 1985 |
| 8 | 8038 |
| 9 | 32097 |
| 10 | 130125 |
| 11 | 525676 |
| 12 | 2131557 |
| 13 | 8635656 |
| 14 | 35017970 |
| 15 | 141968455 |
| 16 | 575692056 |
| 17 | 2334344849 |
| 18 | 9465939422 |
| 19 | 38384559168 |
| 20 | 155652202456 |
| 21 | 631178976378 |
| 22 | 2559476952229 |
| 23 | 10378857744374 |
| 24 | 42087027204278 |
| 25 | 170665938023137 |
| 26 | 692062856184512 |