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 | 1 |
| 2 | 1 |
| 3 | 2 |
| 4 | 5 |
| 5 | 10 |
| 6 | 24 |
| 7 | 53 |
| 8 | 126 |
| 9 | 289 |
| 10 | 686 |
| 11 | 1604 |
| 12 | 3792 |
| 13 | 8925 |
| 14 | 21051 |
| 15 | 49638 |
| 16 | 116858 |
| 17 | 275480 |
| 18 | 647573 |
| 19 | 1525113 |
| 20 | 3580673 |
| 21 | 8423334 |
| 22 | 19755938 |
| 23 | 46422915 |
| 24 | 108783480 |
| 25 | 255359883 |
| 26 | 597932342 |
| 27 | 1402308318 |
| 28 | 3281352516 |
| 29 | 7689369625 |
| 30 | 17982241557 |
| 31 | 42108302007 |
| 32 | 98422076879 |
| 33 | 230322745835 |