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 | 4 |
| 2 | 228 |
| 3 | 812340 |
| 4 | 4935504 |
| 5 | 13608420 |
| 6 | 14218512 |
| 7 | 25354032 |
| 8 | 29463060 |
| 9 | 48880608 |
| 10 | 135516108 |
| 11 | 194057640 |
| 12 | 223078944 |
| 13 | 412662012 |
| 14 | 763311948 |
| 15 | 764539380 |
| 16 | 1409359200 |
| 17 | 1998370272 |
| 18 | 3408412644 |
| 19 | 5397667572 |
| 20 | 7650577620 |
| 21 | 8224333236 |
| 22 | 9401817516 |