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 | 7 |
| 3 | 22 |
| 4 | 64 |
| 5 | 176 |
| 6 | 464 |
| 7 | 1184 |
| 8 | 2944 |
| 9 | 7168 |
| 10 | 17152 |
| 11 | 40448 |
| 12 | 94208 |
| 13 | 217088 |
| 14 | 495616 |
| 15 | 1122304 |
| 16 | 2523136 |
| 17 | 5636096 |
| 18 | 12517376 |
| 19 | 27656192 |
| 20 | 60817408 |
| 21 | 133169152 |
| 22 | 290455552 |
| 23 | 631242752 |
| 24 | 1367343104 |
| 25 | 2952790016 |
| 26 | 6358564864 |
| 27 | 13656653824 |
| 28 | 29259464704 |