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 | 17 |
| 2 | 49 |
| 3 | 113 |
| 4 | 301 |
| 5 | 797 |
| 6 | 2173 |
| 7 | 5981 |
| 8 | 16645 |
| 9 | 46661 |
| 10 | 131629 |
| 11 | 373181 |
| 12 | 1062481 |
| 13 | 3035777 |
| 14 | 8700601 |
| 15 | 25002473 |
| 16 | 72015925 |
| 17 | 207858677 |
| 18 | 601040317 |
| 19 | 1740812621 |
| 20 | 5049436441 |
| 21 | 14666136521 |
| 22 | 42649909681 |
| 23 | 124166516801 |
| 24 | 361855286617 |