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) |
|---|---|
| 2 | 1 |
| 3 | 4 |
| 4 | 12 |
| 5 | 27 |
| 6 | 57 |
| 7 | 119 |
| 8 | 245 |
| 9 | 497 |
| 10 | 1005 |
| 11 | 2023 |
| 12 | 4063 |
| 13 | 8149 |
| 14 | 16327 |
| 15 | 32692 |
| 16 | 65435 |
| 17 | 130938 |
| 18 | 261965 |
| 19 | 524050 |
| 20 | 1048259 |
| 21 | 2096730 |
| 22 | 4193742 |
| 23 | 8387859 |
| 24 | 16776218 |
| 25 | 33553102 |
| 26 | 67107091 |
| 27 | 134215364 |
| 28 | 268432305 |
| 29 | 536866711 |
| 30 | 1073736223 |
| 31 | 2147476180 |
| 32 | 4294957340 |
| 33 | 8589921317 |
| 34 | 17179851485 |