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 | 8 |
| 2 | 16 |
| 3 | 40 |
| 4 | 88 |
| 5 | 184 |
| 6 | 388 |
| 7 | 800 |
| 8 | 1628 |
| 9 | 3288 |
| 10 | 6584 |
| 11 | 13096 |
| 12 | 25904 |
| 13 | 50984 |
| 14 | 99916 |
| 15 | 195072 |
| 16 | 379572 |
| 17 | 736360 |
| 18 | 1424672 |
| 19 | 2749672 |
| 20 | 5295240 |
| 21 | 10176856 |
| 22 | 19522644 |
| 23 | 37387424 |
| 24 | 71487756 |
| 25 | 136492216 |
| 26 | 260255304 |
| 27 | 495618408 |
| 28 | 942731360 |
| 29 | 1791241544 |
| 30 | 3399976348 |