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 | 0 |
| 2 | 1 |
| 3 | 1 |
| 4 | 6 |
| 5 | 10 |
| 6 | 23 |
| 7 | 49 |
| 8 | 106 |
| 9 | 215 |
| 10 | 444 |
| 11 | 906 |
| 12 | 1849 |
| 13 | 3759 |
| 14 | 7621 |
| 15 | 15402 |
| 16 | 31091 |
| 17 | 62676 |
| 18 | 126206 |
| 19 | 253860 |
| 20 | 510204 |
| 21 | 1024665 |
| 22 | 2056608 |
| 23 | 4125625 |
| 24 | 8272436 |
| 25 | 16580967 |
| 26 | 33223336 |
| 27 | 66550937 |
| 28 | 133278720 |
| 29 | 266857006 |
| 30 | 534220745 |
| 31 | 1069297319 |
| 32 | 2140037990 |
| 33 | 4282507048 |
| 34 | 8569103770 |