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 | 2 |
| 1 | 5 |
| 2 | 11 |
| 3 | 23 |
| 4 | 47 |
| 5 | 97 |
| 6 | 211 |
| 7 | 491 |
| 8 | 1187 |
| 9 | 2857 |
| 10 | 6659 |
| 11 | 14879 |
| 12 | 31891 |
| 13 | 65929 |
| 14 | 132469 |
| 15 | 261059 |
| 16 | 510031 |
| 17 | 999721 |
| 18 | 1988797 |
| 19 | 4048339 |
| 20 | 8450557 |
| 21 | 18014701 |
| 22 | 38902439 |
| 23 | 84347189 |
| 24 | 182269327 |
| 25 | 390630769 |
| 26 | 828123239 |
| 27 | 1735146097 |
| 28 | 3594509969 |
| 29 | 7369765889 |
| 30 | 14975024861 |
| 31 | 30200498591 |
| 32 | 60537295711 |