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 | 2 |
| 2 | 5 |
| 3 | 11 |
| 4 | 24 |
| 5 | 52 |
| 6 | 110 |
| 7 | 227 |
| 8 | 463 |
| 9 | 947 |
| 10 | 1956 |
| 11 | 4073 |
| 12 | 8501 |
| 13 | 17695 |
| 14 | 36654 |
| 15 | 75585 |
| 16 | 155396 |
| 17 | 318958 |
| 18 | 654018 |
| 19 | 1339502 |
| 20 | 2738706 |
| 21 | 5586721 |
| 22 | 11368212 |
| 23 | 23081884 |
| 24 | 46793949 |
| 25 | 94805057 |
| 26 | 192116284 |
| 27 | 389627700 |
| 28 | 791036691 |
| 29 | 1607529164 |
| 30 | 3268715492 |
| 31 | 6647212980 |
| 32 | 13512728367 |
| 33 | 27449702179 |