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 | 4 |
| 2 | 22 |
| 3 | 166 |
| 4 | 1671 |
| 5 | 21510 |
| 6 | 341463 |
| 7 | 6496923 |
| 8 | 144856710 |
| 9 | 3716746006 |
| 10 | 108133664181 |
| 11 | 3523951953981 |
| 12 | 127331488458476 |
| 13 | 5057405619797317 |
| 14 | 219179491109978660 |
| 15 | 10298771194610350427 |
| 16 | 521765883689616772731 |
| 17 | 28363341834962918344084 |