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 | 0 |
| 2 | 0 |
| 3 | 1 |
| 4 | 1 |
| 5 | 5 |
| 6 | 7 |
| 7 | 28 |
| 8 | 48 |
| 9 | 176 |
| 10 | 336 |
| 11 | 1179 |
| 12 | 2420 |
| 13 | 8269 |
| 14 | 17855 |
| 15 | 59832 |
| 16 | 134289 |
| 17 | 443407 |
| 18 | 1025685 |
| 19 | 3346702 |
| 20 | 7933161 |
| 21 | 25632265 |
| 22 | 62000170 |
| 23 | 198670299 |
| 24 | 488801159 |
| 25 | 1555187172 |
| 26 | 3882403641 |
| 27 | 12276230777 |
| 28 | 31034921462 |
| 29 | 97601239282 |
| 30 | 249471619165 |
| 31 | 780790439063 |
| 32 | 2015194486878 |