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 | 1 |
| 2 | 2 |
| 3 | 4 |
| 4 | 10 |
| 5 | 24 |
| 6 | 64 |
| 7 | 164 |
| 8 | 440 |
| 9 | 1164 |
| 10 | 3128 |
| 11 | 8368 |
| 12 | 22552 |
| 13 | 60624 |
| 14 | 163528 |
| 15 | 440768 |
| 16 | 1189616 |
| 17 | 3210000 |
| 18 | 8667296 |
| 19 | 23400304 |
| 20 | 63196192 |
| 21 | 170668608 |
| 22 | 460972768 |
| 23 | 1245085184 |
| 24 | 3363190688 |
| 25 | 9084616128 |
| 26 | 24540062528 |
| 27 | 66289885504 |
| 28 | 179071151872 |
| 29 | 483733046208 |
| 30 | 1306740302848 |
| 31 | 3529993576448 |
| 32 | 9535868752256 |