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 | 0 |
| 1 | 0 |
| 2 | 1 |
| 3 | 4 |
| 4 | 11 |
| 5 | 26 |
| 6 | 62 |
| 7 | 134 |
| 8 | 303 |
| 9 | 634 |
| 10 | 1394 |
| 11 | 2872 |
| 12 | 6206 |
| 13 | 12676 |
| 14 | 27068 |
| 15 | 54994 |
| 16 | 116423 |
| 17 | 235706 |
| 18 | 495722 |
| 19 | 1001168 |
| 20 | 2094714 |
| 21 | 4223020 |
| 22 | 8798756 |
| 23 | 17715084 |
| 24 | 36782246 |
| 25 | 73980516 |
| 26 | 153161332 |
| 27 | 307808464 |
| 28 | 635675228 |
| 29 | 1276699336 |
| 30 | 2630957432 |
| 31 | 5281304554 |
| 32 | 10863149303 |
| 33 | 21797013946 |