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 | 27 |
| 1 | 482 |
| 2 | 3855 |
| 3 | 20329 |
| 4 | 82346 |
| 5 | 277295 |
| 6 | 813738 |
| 7 | 2145712 |
| 8 | 5192450 |
| 9 | 11708366 |
| 10 | 24881487 |
| 11 | 50269005 |
| 12 | 97217758 |
| 13 | 180966915 |
| 14 | 325691821 |
| 15 | 568823951 |
| 16 | 967074547 |
| 17 | 1604701323 |
| 18 | 2604691419 |
| 19 | 4143692621 |
| 20 | 6471712062 |
| 21 | 9937820779 |
| 22 | 15023357512 |
| 23 | 22384420182 |
| 24 | 32905773076 |
| 25 | 47768686720 |