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 | 2 |
| 4 | 4 |
| 5 | 8 |
| 6 | 17 |
| 7 | 36 |
| 8 | 83 |
| 9 | 202 |
| 10 | 519 |
| 11 | 1382 |
| 12 | 3766 |
| 13 | 10352 |
| 14 | 28551 |
| 15 | 78756 |
| 16 | 217224 |
| 17 | 599542 |
| 18 | 1657983 |
| 19 | 4598766 |
| 20 | 12803044 |
| 21 | 35785664 |
| 22 | 100412731 |
| 23 | 282753476 |
| 24 | 798690091 |
| 25 | 2262087814 |
| 26 | 6421507153 |
| 27 | 18265543282 |
| 28 | 52047980674 |
| 29 | 148554917816 |
| 30 | 424656556001 |
| 31 | 1215691192244 |