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) |
|---|---|
| 1 | 7 |
| 2 | 6 |
| 3 | 12 |
| 4 | 23 |
| 5 | 56 |
| 6 | 118 |
| 7 | 292 |
| 8 | 683 |
| 9 | 1692 |
| 10 | 4180 |
| 11 | 10604 |
| 12 | 26978 |
| 13 | 69720 |
| 14 | 181162 |
| 15 | 475072 |
| 16 | 1252756 |
| 17 | 3324096 |
| 18 | 8861054 |
| 19 | 23729740 |
| 20 | 63786792 |
| 21 | 172066648 |
| 22 | 465566598 |
| 23 | 1263208676 |
| 24 | 3435891568 |
| 25 | 9366558088 |
| 26 | 25585826404 |
| 27 | 70019830220 |
| 28 | 191943097314 |
| 29 | 526978629656 |
| 30 | 1448862393216 |
| 31 | 3988658225028 |
| 32 | 10993822451304 |
| 33 | 30335737458872 |
| 34 | 83793421017568 |