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 | 11 |
| 5 | 28 |
| 6 | 80 |
| 7 | 194 |
| 8 | 461 |
| 9 | 1036 |
| 10 | 2263 |
| 11 | 4800 |
| 12 | 9960 |
| 13 | 20268 |
| 14 | 40577 |
| 15 | 80086 |
| 16 | 156115 |
| 17 | 301004 |
| 18 | 574744 |
| 19 | 1087918 |
| 20 | 2043229 |
| 21 | 3810320 |
| 22 | 7060079 |
| 23 | 13004832 |
| 24 | 23826480 |
| 25 | 43437240 |
| 26 | 78827425 |
| 27 | 142446698 |
| 28 | 256400411 |
| 29 | 459826588 |
| 30 | 821834624 |
| 31 | 1464149690 |
| 32 | 2600662157 |
| 33 | 4606368148 |