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) |
|---|---|
| 9 | 1 |
| 10 | 1 |
| 11 | 3 |
| 12 | 6 |
| 13 | 13 |
| 14 | 26 |
| 15 | 56 |
| 16 | 115 |
| 17 | 247 |
| 18 | 533 |
| 19 | 1174 |
| 20 | 2633 |
| 21 | 6031 |
| 22 | 14055 |
| 23 | 33343 |
| 24 | 80386 |
| 25 | 196569 |
| 26 | 487017 |
| 27 | 1220491 |
| 28 | 3090331 |
| 29 | 7896160 |
| 30 | 20341323 |
| 31 | 52783053 |
| 32 | 137867631 |
| 33 | 362237861 |
| 34 | 956881142 |
| 35 | 2540051927 |
| 36 | 6772828374 |
| 37 | 18133435767 |
| 38 | 48734282113 |
| 39 | 131434508449 |
| 40 | 355627568994 |