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 | 8 |
| 3 | 24 |
| 4 | 60 |
| 5 | 136 |
| 6 | 292 |
| 7 | 608 |
| 8 | 1244 |
| 9 | 2520 |
| 10 | 5076 |
| 11 | 10192 |
| 12 | 20428 |
| 13 | 40904 |
| 14 | 81860 |
| 15 | 163776 |
| 16 | 327612 |
| 17 | 655288 |
| 18 | 1310644 |
| 19 | 2621360 |
| 20 | 5242796 |
| 21 | 10485672 |
| 22 | 20971428 |
| 23 | 41942944 |
| 24 | 83885980 |
| 25 | 167772056 |
| 26 | 335544212 |
| 27 | 671088528 |
| 28 | 1342177164 |
| 29 | 2684354440 |