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 | 0 |
| 3 | 1 |
| 4 | 4 |
| 5 | 10 |
| 6 | 24 |
| 7 | 53 |
| 8 | 116 |
| 9 | 246 |
| 10 | 520 |
| 11 | 1082 |
| 12 | 2248 |
| 13 | 4628 |
| 14 | 9520 |
| 15 | 19469 |
| 16 | 39796 |
| 17 | 81022 |
| 18 | 164904 |
| 19 | 334670 |
| 20 | 679064 |
| 21 | 1374924 |
| 22 | 2783440 |
| 23 | 5625666 |
| 24 | 11368904 |
| 25 | 22945820 |
| 26 | 46307664 |
| 27 | 93358228 |
| 28 | 188202256 |
| 29 | 379078952 |
| 30 | 763506784 |
| 31 | 1536708413 |
| 32 | 3092806516 |
| 33 | 6220970702 |
| 34 | 12512656744 |
| 35 | 25154958278 |