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 | 0 |
| 3 | 1 |
| 4 | 4 |
| 5 | 7 |
| 6 | 19 |
| 7 | 36 |
| 8 | 82 |
| 9 | 170 |
| 10 | 362 |
| 11 | 740 |
| 12 | 1537 |
| 13 | 3144 |
| 14 | 6443 |
| 15 | 13116 |
| 16 | 26661 |
| 17 | 54034 |
| 18 | 109386 |
| 19 | 221121 |
| 20 | 446502 |
| 21 | 900436 |
| 22 | 1814910 |
| 23 | 3655069 |
| 24 | 7356483 |
| 25 | 14796994 |
| 26 | 29750473 |
| 27 | 59789057 |
| 28 | 120112121 |
| 29 | 241218391 |
| 30 | 484287995 |
| 31 | 972034297 |
| 32 | 1950544851 |
| 33 | 3913243144 |
| 34 | 7849331541 |
| 35 | 15741697002 |