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 | 26 |
| 2 | 351 |
| 3 | 3302 |
| 4 | 24427 |
| 5 | 151658 |
| 6 | 822484 |
| 7 | 4001660 |
| 8 | 17799041 |
| 9 | 73391968 |
| 10 | 283542740 |
| 11 | 1034983222 |
| 12 | 3593364255 |
| 13 | 11931569028 |
| 14 | 38062054017 |
| 15 | 117095671862 |
| 16 | 348538604492 |
| 17 | 1006539781078 |
| 18 | 2827014674081 |
| 19 | 7738495452714 |
| 20 | 20683325376064 |
| 21 | 54066855041446 |
| 22 | 138427417637249 |
| 23 | 347584258977384 |